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Mana is the resource used in Hearthstone to play cards and use Hero Powers, each of which has a mana cost that must be paid to use it. The supply of mana is represented by Mana Crystals, displayed at the bottom right of the screen. This supply automatically increases and refills each turn, although certain cards can also affect it. Mana is the only resource used in Hearthstone, and is the primary limiting factor on the play of cards.

A player's mana is displayed in-game with two numbers:

  • The first is the number of available mana (also referred to as current mana, or simply mana).
  • The second is the number of permanent Mana Crystals (also referred to as maximum mana).

On the right of these numbers, the statuses of Mana Crystals are displayed visually with different icons: filled / empty / Overloaded / pending Overloaded.

A player with 6 available mana, 9 permanent Mana Crystals (5 filled, 2 empty, 2 Overloaded), 1 temporary Mana Crystal, and 1 mana pending Overloaded for the next turn.

Mana Crystals[edit | edit source]

Mana Crystals are usually permanent, although some effects explicitly grant temporary Mana Crystals for that turn only.

Permanent Mana Crystals can be in one of the following statuses:

  • filled Mana Crystals (displayed with a glowing blue icon) increase also the amount of available mana, and thus can be used to pay mana costs.
  • empty Mana Crystals (displayed with a darkened blue icon) cannot be used to pay mana costs until they are refilled.
  • Overloaded Mana Crystals (displayed with a gray padlock icon) cannot be used to pay mana costs until they are unlocked and refilled.

Effects that give Mana Crystals for "this turn only" (Innervate, The Coin, Counterfeit Coin, Gallywix's Coin) grant temporary Mana Crystals, which increase available mana for that turn but do not affect maximum mana.

  • Visually, temporary Mana Crystals are displayed to the right of permanent Mana Crystals or, if there is no room, they appear to refill existing empty Mana Crystals (as usual, granting temporary Mana Crystals to a player with 10 available mana has no effect).
  • The mana in temporary Mana Crystals is always spent before the mana in permanent Crystals. When their mana is spent, temporary Mana Crystals disappear rather than becoming empty.
  • Temporary Mana Crystals cannot be Overloaded nor pending Overloaded, and are not destroyed by abilities that destroy Mana Crystals, despite some visual bugs may occur (see below).[1]

Maximum mana[edit | edit source]

The number of permanent Mana Crystals, called maximum mana, is displayed by the second number of the mana counter at the bottom right of the screen.

Players begin the game with 0 permanent Mana Crystals.

Permanent Mana Crystals can be gained in the following ways, up to a maximum of 10:

Effects that destroy Mana Crystals (Felguard, Blastcrystal Potion, Darnassus Aspirant's Deathrattle) permanently destroy permanent Mana Crystals, starting from empty ones, decreasing maximum mana up to a minimum of 0.

  • If a player is forced to lose a filled Mana Crystal (because all of their permanent Mana Crystals are filled) their available mana will be reduced accordingly for the current turn too. Otherwise, their available mana is not reduced for the current turn, but only for subsequent ones.
  • A player can never have less than 0 maximum mana[2].
Example: If a player repeatedly plays Felguard to destroy all of their Mana Crystals[3] and then plays another Felguard, nothing happens.
Example: A player that has one of their Mana Crystals destroyed will have one less mana each turn until they reach 10 Mana Crystals. Thus, if that player was already at 10 Mana Crystals, they will lose a Mana Crystal but simply regain it at the beginning of their next turn.

Available mana[edit | edit source]

The number of currently filled Mana Crystals, called available mana or current mana, is displayed by the first number of the mana counter at the bottom right of the screen and represents the amount of mana that is still available for the player to use cards and Hero Powers that turn.

Available mana can be increased in the following ways, up to a maximum of 10:

  • At the start of each player's turn all of their non-Overloaded Mana Crystals are refilled, increasing available mana accordingly. (This means that mana left unspent by the end of the turn is essentially wasted, since it is refilled anyway at the beginning of the next turn.)
  • Effects that give Mana Crystals for "this turn only" (Innervate, The Coin, Counterfeit Coin, Gallywix's Coin) grant temporary Mana Crystals, which increase available mana for that turn.
  • Effects that give permanent filled Mana Crystals to a player (Nourish, Astral Communion, Grove Tender, Arcane Golem, Demonfuse) increase both available and maximum mana accordingly.
  • Kun the Forgotten King's second effect refills all of his controller's non-Overloaded Mana Crystals, increasing available mana accordingly.
  • Lava Shock and Eternal Sentinel unlock and refill all currently Overloaded Mana Crystals, increasing available mana accordingly, and remove all currently pending Overloaded mana.
  • A player can never have more than 10 available mana (thus, for example, playing Innervate with 10 available mana will have no effect), but effects that grant extra Mana Crystals or that refill the player's Mana Crystals can be played after some mana is expended, thus allowing a total expenditure of more than 10 mana in that turn. Effects that grant one or more permanent Mana Crystals while the player already has 10 permanent Mana Crystals generate an Excess Mana for the player instead.

Available mana can be reduced in the following ways:

  • When a player spends mana to play cards or use Hero Powers, their available mana is reduced accordingly. This is the most frequent way a players' available mana is reduced, up to the beginning of their next turn when their Mana Crystals are refilled and they can spend their mana again.
    • Each card and Hero Power has a specific mana cost, displayed as a number inside a blue crystal in the upper left corner of each card and at the top of each Hero Power, which represents the amount of mana that must be expended in order to play that card or use that Hero Power. Some effects can decrease or increase these mana costs: for a list of such effects and how they interact with each other, see Mana cost.
    • Cards can be played and Hero Powers can be used only if their mana cost can be paid. Note that the mana cost must be paid before any card effects are taken into account, so cards like Lava Shock or Nourish cannot be cast if the player has less than the stated mana cost, even if the card itself would free up enough mana.
    • Mana spent is taken from temporary Mana Crystals first (which disappear after being used), and any exceeding cost is then taken from permanent Mana Crystals (which become empty).
  • Effects that destroy Mana Crystals (Felguard, Blastcrystal Potion, Darnassus Aspirant) reduce available mana only if they are forced to destroy filled Mana Crystals.
  • The spend mana ability consumes all the player's available mana as part of the card's effect, producing an effect proportional to the amount spent. Cards that spend mana can be played even when there is no mana left to consume (although in that case the ability will simply have no additional effect).
  • Cards with Overload that are played from the hand reduce the amount of mana available the next turn by the stated amount. More precisely, playing a card with Overload causes the stated amount of Mana Crystals to become pending Overloaded (a padlock icon appears beneath a permanent Mana Crystal for each point Overload), and at the start of the next turn that Mana Crystals will become Overloaded: the padlocks will move up and block out the player's Mana Crystals, effectively preventing them from being refilled and used for that turn.
  • A player's current and/or pending Overloaded Mana Crystals has no upper limit. For example, a player can Overload more mana than they will have the next turn: even if the user interface will only display Overload equal to the player's maximum mana, the excess will still be registered and will affect mana-generating effects like The Coin.[4]. Once the Overload has been matched, any further mana generated will be usable by the player, and will be reflected in the mana counter.
  • Overload affects available mana for the next turn only, even if it is greater than that turn's maximum mana: current Overload will disappear (regardless of its amount) at the beginning of the player's next turn, when it is substituted by previous turn's pending Overload.
Example: If a player plays two Dust Devils on turn two, on the next turn they will have 4 Overloaded mana despite having only 3 Mana Crystals: this mana deficit will not carry over to subsequent turns, thereby allowing the player to avoid paying that part of the Overload cost at all.
  • Overloaded and pending Overloaded mana are not displayed for the opponent: players trying to estimate the opponent's available mana next turn can use the history to check the cards played that turn.
  • Available mana has no lower limit and thus, with enough Overload, "actual" available mana can be negative: although the game interface simply displays negative available mana as 0 and gives no sign at all that excess Overload remains, the excess will still be registered, and will counter mana generation through effects like Innervate.
  • However, no amount of Overload will prevent the player from playing 0-Cost cards:[4] since these cards cost no mana, the player's current mana total is irrelevant.

Visual bugs[edit | edit source]

  • If a player playing Nourish, Grove Tender or Astral Communion has not enough room for the new Mana Crystals, they will replace any empty Mana Crystals (usually some of those emptied in order to play that card) or, if there are not, any Overloaded Mana Crystals (despite Overloaded Mana Crystals visually appear to remain locked, the available mana counter is increased correctly). However, pending Overload is not affected, and will be reduce available mana for the next turn as usual.[5]
  • Effects that destroy Mana Crystals (such as Felguard) sometimes seem to destroy a pending Overloaded Mana Crystal: however, despite the visual appearance, losing (or gaining) maximum mana has no effect on your pending/current Overload.[6]
  • While The Coin works correctly in relation to excess Overloaded mana, the visual effect does not: playing The Coin while having more Overloaded mana than current Mana Crystals will create a new, fully charged, non-padlocked Mana Crystal; however, the player will not be able to draw mana from that Mana Crystal, due to Overload.[4]
  • If you have 0/10 mana due to 10 Overloaded Mana Crystals and play The Coin, the mana counter will correctly display 1/10 mana, but visually you will still have 10 locked Mana Crystals and no filled one.[7] Similarly, if you have 10 permanent Mana Crystals, some of which are Overloaded and the remaining ones are filled, and gain some temporary Mana Crystals, their mana will be usable and displayed in the mana counter although displayed Mana Crystals are still Overloaded/filled as before.[8]

Strategy[edit | edit source]

Main article: Mana curve

The limited but slowly-increasing supply of mana serves to delay and add pace to the game, preventing players from simply playing their most powerful cards on round one. It also crafts the game into distinct phases, with higher-value cards only becoming playable in later rounds. The increase of available mana over the course of a match is referred to as the mana curve, and is a key strategic concept, both during play and in deck building.

As one of the key limiting resources in the game, effective mana management is essential for achieving victory in Hearthstone. While generally it is ideal to make use of all available mana each turn to maintain tempo, in practice it is sometimes wiser to hold back cards until the right time, especially if planning a combo. While this may lead to mana being 'wasted', taking a more cautious approach to card playing can win games. Hero Powers, while intentionally mana-inefficient, may be helpful for making use of mana every turn without consuming cards.

The mana cost of a card determines which round it will become available to play, as well as which cards it can be used in combination with. This concept is used in deck building to ensure viable options each turn, and can also be used to predict which cards may be played on certain rounds, such as Mind Control generally only becoming playable from round 10 onwards.

Related cards[edit | edit source]

The following cards have effects that specifically alter a player's available and/or maximum mana (these effects are most commonly found in druid cards). Not listed here are cards with Overload (found only in shaman cards), which reduce available mana for the next turn (see Overload for a list).

For a list of cards that modify mana costs rather than available/maximum mana, see Mana cost instead.

Name / Desc Rarity Type Subtype Class Cost Atk HP Description
The Coin None Spell Any 0
Gain 1 Mana Crystal this turn only. Whether you spend it or save it, it's always there for a second.
The Coin None Spell Any 0
Gain 1 Mana Crystal this turn only. Just one of these could buy you sixty whole seconds of Whack-a-Gnoll bliss.
Obtained by owning all Darkmoon Faire set cards.
The Coin None Spell Any 0
Gain 1 Mana Crystal this turn only. Keep an eye on your money at the faire, they said.
Earnable after purchasing the Tavern Pass.
Innervate Free Spell Druid 0
Gain 1 Mana Crystal this turn only. Some druids still have flashbacks from strangers yelling "Innervate me!!" at them.
Wild Growth Free Spell Druid 3
Gain an empty Mana Crystal. Grow your own mana crystals with this Mana Crystal Growth Kit, only 39.99!
Lightning Bloom Common Spell 0
Gain 2 Mana Crystals this turn only.
Overload: (2) Curiously, this plant never blooms in the same place twice.
Learn Draconic Common Spell Mage 1
Sidequest: Spend 8 Mana on spells. Reward: Summon a 6/6 Dragon. Upon taking up the spellbook, Reno realized with a start: "I can't read."
Mana Burn Common Spell Demon Hunter 1
Your opponent has 2 fewer Mana Crystals next turn. One way to ensure they are not prepared.
Strength in Numbers Common Spell Druid 1
Sidequest: Spend 10 Mana on minions.
Reward: Summon a minion from your deck. One minion, two minions... tree minions!
Bogbeam Common Spell Druid 3
Deal 3 damage to a minion.
Costs (0) if you have at least 7 Mana Crystals. Some think the mysterious bright lights in the bog are alien invaders, others think they're just swamp gas. Turns out, it's just druids.
Overgrowth Common Spell Druid 4
Gain two empty Mana Crystals. Zangarmarsh: it's a fungal out there!
Forbidden Words Rare Spell Priest 0
Spend all your Mana. Destroy a minion with that much Attack or less. Please confirm your age before reading this flavor text.
Breath of Dreams Rare Spell Druid 2
Draw a card. If you're holding a Dragon, gain an empty Mana Crystal. Ysera has the worst morning breath.
Ironbark Rare Spell Druid 2
Give a minion +1/+3 and Taunt. Costs (0) if you have at least 7 Mana Crystals. "The important thing, son, is to protect your spores! I have spoken!"
Arcane Golem Rare Minion General Any 3 4 4
Battlecry: Give your opponent a Mana Crystal. Having Arcane golems at home really classes up the place, and as a bonus they are great conversation pieces.
Felguard Rare Minion Demon Warlock 3 3 5
Taunt. Battlecry: Destroy one of your Mana Crystals. Yes, he'll fight for you. BUT HE'S NOT GOING TO LIKE IT.
Nourish Rare Spell Druid 6
Choose One - Gain 2 Mana Crystals; or Draw 3 cards. Druids take nourishment from many things: the power of nature, the songbird's chirp, a chocolate cake.
Crystal Merchant Epic Minion General Druid 2 1 4
If you have any unspent Mana at the end of your turn, draw a card. I won't ask about your mana curve if you don't ask where I got these.
Chaos Gazer Epic Minion Demon Warlock 3 4 3
Battlecry: Curse a playable card in your opponent's hand. They have 1 turn to play it! No matter the game rules, it's always playing Go Fish.
Revenant Rascal Epic Minion General Warlock 3 3 3
Battlecry: Destroy a Mana Crystal for both players. Turns out his face really did get stuck that way.
Escaped Manasaber Epic Minion Beast Any 4 3 5
Whenever this attacks, gain 1 Mana Crystal this turn only. Captive manasabers don't behave much better--they're always scratching your furniture and coughing up mana balls.
Omega Devastator Epic Minion Mech Warrior 4 4 5
Battlecry: If you have 10 Mana Crystals, deal 10 damage to a minion. The Alpha Devastator didn't devastate enough. The Beta Devastator devastated too much. But the Omega was just right!
Untapped Potential Legendary Spell Druid 1
Quest: End 4 turns with any unspent Mana.
Reward: Ossirian Tear. The official term is "strategic laziness."
Nozdormu the Timeless Legendary Minion Dragon Paladin 4 8 8
Battlecry: Set each player to 10 Mana Crystals. Time is mana!
Showing all 24 cards
Forbidden Words(90548).png
Lightning Bloom(329861).png
The Coin(389164).png
The Coin(141).png
The Coin(389163).png
Learn Draconic(127286).png
Mana Burn(210685).png
Strength in Numbers(151410).png
Untapped Potential(90698).png
Breath of Dreams(127269).png
Crystal Merchant(90806).png
Arcane Golem(97).png
Chaos Gazer(176349).png
Revenant Rascal(378838).png
Wild Growth(282).png
Escaped Manasaber(184667).png
Nozdormu the Timeless(127301).png
Omega Devastator(90559).png

Wild format

Wild icon.png  This section contains information exclusive to Wild format.
Name / Desc Rarity Type Subtype Class Cost Atk HP Description
Gallywix's Coin None Spell Any 0
Gain 1 Mana Crystal this turn only. (Won't trigger Gallywix.) 
Mana Treant None Minion General Druid 2 2 2
Deathrattle: Gain an empty Mana Crystal. 
Biology Project Common Spell Druid 1
Each player gains 2 Mana Crystals. Step 1: Grow giant evil strawberry.
Step 2: ????
Step 3: Rule Azeroth!
Demonfuse Common Spell Warlock 2
Give a Demon +3/+3. Give your opponent a Mana Crystal. Very dangerous when attached to a demonbomb.
Jade Blossom Common Spell Druid 3
Summon a Jade Golem. Gain an empty Mana Crystal. Meditating under a jade blossom is said to grant you wisdom, unless you have a pollen allergy.
Blastcrystal Potion Common Spell Warlock 4
Destroy a minion and one of your Mana Crystals. There's a fine line between "potion" and "grenade". Wait. Actually, there's not.
Counterfeit Coin Rare Spell Rogue 0
Gain 1 Mana Crystal this turn only. There is something funny about this coin… can't quite put my finger on it…
Forbidden Ritual Rare Spell Warlock 0
Spend all your Mana. Summon that many 1/1 Tentacles. Actually, C'Thun gives his full support for this ritual.
Omega Assembly Rare Spell Warrior 1
Discover a Mech. If you have 10 Mana Crystals, keep all 3 cards. They told Dr. Boom he could only pick one. He disagreed.
Darnassus Aspirant Rare Minion General Druid 2 2 3
Battlecry: Gain an empty Mana Crystal. Deathrattle: Lose a Mana Crystal. She loves mana crystals, she hates mana crystals. So fickle!
Lava Shock Rare Spell Shaman 2
Deal 2 damage.
Unlock your Overloaded Mana Crystals. Chocolate lava cake is shockingly delicious.
Greedy Sprite Rare Minion General Druid 3 3 1
Deathrattle: Gain an empty Mana Crystal. Sparkliest of the seven deadly sprites.
Grove Tender Rare Minion General Druid 3 2 4
Choose One - Give each player a Mana Crystal; or Each player draws a card. Likes: Hiking and the great outdoors. Dislikes: Goblin shredders and sandals. (Can’t find any that fit!).
Omega Medic Rare Minion General Priest 3 3 4
Battlecry: If you have 10 Mana Crystals, restore 10 Health to your hero. She feels waiting for healing makes you appreciate it more.
Mire Keeper Rare Minion General Druid 4 3 3
Choose One - Summon a 2/2 Slime; or Gain an empty Mana Crystal. "Hey.... Is that Mire for sale?" "No. I'm keeping it."
Forbidden Flame Epic Spell Mage 0
Spend all your Mana. Deal that much damage to a minion. WARNING: This flame is not to be used unless you are a licensed acolyte of the Old Gods.
Forbidden Healing Epic Spell Paladin 0
Spend all your Mana. Heal for double the mana you spent. No one's quite sure why it's forbidden. And yes, that should make you nervous.
Forbidden Shaping Epic Spell Priest 0
Spend all your Mana. Summon a random minion that costs that much. But the minion arrives covered in goo.
Forbidden Ancient Epic Minion General Druid 1 1 1
Battlecry: Spend all your Mana. Gain +1/+1 for each mana spent. This Ancient was banned from the local tavern after tucking a 'Dr. Boom' up its sleeve.
Eternal Sentinel Epic Minion General Shaman 2 3 2
Battlecry: Unlock your Overloaded Mana Crystals. Just try to avoid eye contact.
Omega Mind Epic Minion General Shaman 2 2 3
Battlecry: If you have 10 Mana Crystals, your spells have Lifesteal this turn. Has a side-business selling her lipstick shade, "Omega Red."
Transfer Student Epic Minion General Any 2 2 2
Taunt. Battlecry: If you have 10 Mana Crystals, gain +5/+5. 
Transfer Student Epic Minion General Any 2 2 2
Battlecry: Spend all your Mana. Summon a random minion of that Cost. 
Pilfered Power Epic Spell Druid 3
Gain an empty Mana Crystal for each friendly minion. The Hozen don't get paid much, but at least they get to keep any excess mana.
Surrender to Madness Epic Spell Priest 3
Destroy 3 of your Mana Crystals. Give all minions in your deck +2/+2. Never give up, always surrender!
Astral Communion Epic Spell Druid 4
Gain 10 Mana Crystals. Discard your hand. Hey! Moon! Can I have some mana crystals?
Omega Defender Epic Minion General Any 4 2 6
Battlecry: If you have 10 Mana Crystals gain +10 Attack. "Surrender. You have 10 mana to comply."
Living Mana Epic Spell Druid 5
Transform your Mana Crystals into 2/2 Treants. Recover the mana when they die. If you truly love your mana, set it free.
Omega Agent Epic Minion General Warlock 5 4 5
Battlecry: If you have 10 Mana Crystals, summon 2 copies of this minion. They don't just find the truth. They give it a ten second head start, then hunt it down.
Floop's Glorious Gloop Legendary Spell Druid 1
Whenever a minion dies this turn, gain 1 Mana Crystal this turn only. How much gloop could Floop's Gloop gloop if Floop's Gloop could gloop gloop?
Twig of the World Tree Legendary Weapon Druid 4 1 5
Deathrattle: Gain 10 Mana Crystals. For druids who want to branch out.
Mojomaster Zihi Legendary Minion General Any 6 5 5
Battlecry: Set each player to 5 Mana Crystals. Sadly, she was still two credits short of her Witch Doctorate.
Kun the Forgotten King Legendary Minion General Druid 10 7 7
Choose One - Gain 10 Armor; or Refresh your Mana Crystals. Aya siphons a bit of Kun's soul to animate each golem in her Jade army. To his credit, he's being a great sport about it.
Showing all 33 cards
Counterfeit Coin(49643).png
Forbidden Flame(33124).png
Forbidden Healing(33126).png
Forbidden Ritual(35217).png
Forbidden Shaping(33125).png
Gallywix's Coin(12327).png
Biology Project(89808).png
Floop's Glorious Gloop(89898).png
Forbidden Ancient(35213).png
Omega Assembly(89845).png
Darnassus Aspirant(22303).png
Eternal Sentinel(35231).png
Lava Shock(14440).png
Mana Treant(55494).png
Omega Mind(89885).png
Transfer Student(211512).png
Transfer Student(211504).png
Greedy Sprite(76972).png
Grove Tender(12273).png
Jade Blossom(49703).png
Omega Medic(89834).png
Pilfered Power(49636).png
Surrender to Madness(90151).png
Astral Communion(22334).png
Blastcrystal Potion(49741).png
Mire Keeper(33162).png
Omega Defender(89809).png
Twig of the World Tree(76878).png
Living Mana(55491).png
Omega Agent(89822).png
Mojomaster Zihi(90250).png
Kun the Forgotten King(49628).png

Trivia[edit | edit source]

  • Unlike in many other games, including World of Warcraft, in Hearthstone mana is apparently not an arcane or purely magical power, and can be wielded by heroes of all classes. Notably, warriors, rogues and hunters normally use resources other than mana.

See also[edit | edit source]

References[edit | edit source]

  1. Tested by User:Elekim, 15th March 2017. With Emperor Thaurissan to reduce costs and Lorewalker Cho to get multiple Shadowsteps, I destroyed all my Mana Crystals with Felguards (going to 0/0 mana), then played The Coin (going to 1/0 mana), then played Cho'gall with cost reduced to 0 in order to cast Blastcrystal Potion: my mana counter was still at 1/0, and I was able to play a 1-Cost card (see Media:Mana-TempNotDestroy.jpg).
  2. BuB ChaCha (2015-02-25). The Coin vs. Felguard|幸運幣vs.惡魔守衛
  3. BuB ChaCha (2015-02-17). Miracle Warlock:(1)Mana vs.Felguard|(1)法力水晶vs.惡魔守衛
  4. 4.0 4.1 4.2 Tested by User:Taohinton, 2014-02-19. Tested twice: Played Dust Devil x 2 on turn 2. On turn 3 the mana bar showed 0/3 mana. Played The Coin and a fourth mana crystal appeared, without a padlock. However, the total remained at 0/3, and I was unable to play any 1 mana cards
  5. Elekim on Twitter. (2017-03-05). 
  6. Tested by User:Elekim, 8th March 2017. Started the turn with 6/10 mana due to 4 Overload; played Flameweather Faceless and Blastcrystal Potion, resulting in 0/9 mana, 4 current Overload and 2 pending Overload: however, one Overloaded and one pending Overloaded Mana Crystals seem to have been destroyed (see Media:ManaDestroyOverload1.jpg). Mana was correctly 8/10 at the start of the following turn, although displayed with one locked and one empty Mana Crystal (see Media:ManaDestroyOverload2.jpg).
  7. Tested by User:Elekim, 13th March 2017 (see Media:ManaOverloadCoin.jpg).
  8. BuB ChaCha (2015-02-17). Overload:(10) vs. Innervate 超載:(10) vs.啟動