Battlecry: Destroy your hero and replace him with Lord Jaraxxus.
"TRIFLING GNOME! YOUR ARROGANCE WILL BE YOUR UNDOING!!!!"
- "You face Jaraxxus, eredar lord of the Burning Legion!"
 How to get
|Golden Lord Jaraxxus||3200||1600|
- Lord Jaraxxus, when played, transforms your hero into Lord Jaraxxus. Your health is instantly set to a new maximum of 15, your power is replaced by the ability INFERNO!, which allows you to summon a 6/6 Infernal every turn for 2 mana, and you equip Blood Fury, a weapon with 3 attack and 8 durability. Note that the warlock is able to attack immediately using Blood Fury.
- Lord Jaraxxus counts as a demon for the purpose of spell selections. This means Sacrificial Pact will kill Lord Jaraxxus instantly, so an excess of caution should be exercised before playing him in a warlock mirror match or against a priest with Thoughtsteal.
- Playing Lord Jaraxxus initially summons him as a minion, before his Battlecry transforms him into a hero who then takes over from the playing hero.
- Because of this, abilities that trigger when you play a minion will affect him. This includes Snipe, which will deal 4 damage to him, leading to a hero with only 11 health; Repentance, which will reduce his health to 1; and Mirror Entity, which will summon a permanent 3/15 Lord Jaraxxus minion for the opponent, albeit without any special text or abilities - this can also be achieved through cards such as Mindgames and Alarm-o-Bot. However, once Jaraxxus has become a hero, he no longer counts as a minion, and cannot be targeted with spells such as Demonfire.
- As a minion, Lord Jaraxxus also cannot be played when the player's side of the battlefield is full (7 minions)
Lord Jaraxxus is best played when you have less than 15 health so you regain some health. The new ability to summon 6/6 infernals in addition to Blood Fury increase your damage output every turn for a low mana cost, making it a good addition to any warlock deck.
Once Jaraxxus is played, the warlock assumes a vastly improved position - with the possible exception of their Health. The new hero power and weapon empower the warlock greatly, and will likely lead them to defeat their opponent within a short time. The main downside to playing Lord Jaraxxus - provided the warlock's health is already below 15 - is the mana cost. This prevents most other actions that round, giving the opponent the advantage.
The increased power of Jaraxxus means that in most cases, the warlock will go on to win the game if their opponent does not defeat them in the space of a few rounds. The ability to generate 6/6 Infernals each round, as well as the use of a substantial weapon, all in addition to the warlock's normal card play, tends to present an insurmountable advantage for the opponent to overcome, and almost guarantees control of the board within a few rounds. This generally leaves a short window in which the opponent has a reasonable chance of destroying the warlock before their victory is assured. Exceptions to this state of affairs include mage Freeze/spell decks, which may be capable of finishing the warlock regardless of the state of the board.
The state of the board is crucial when deciding the right time to play Jaraxxus. If the opponent has a selection of strong minions while the warlock has none, playing Jaraxxus may give them just the chance they need to finish the warlock off. However, if the board is empty or fairly evenly-balanced, the warlock need only hold their ground for a little while before Jaraxxus' powers lead them to victory. Cards like Twisting Nether are ideal for play in combination with Lord Jaraxxus, allowing the warlock to even the odds before tipping them substantially in their own favour. Jaraxxus is also generally less risky to play when the opponent's hand is small or empty.
Another common strategy with this card involves taking a lot of punishment intentionally, so you can summon Molten Giants, and then using Jaraxxus to heal yourself. Note though that the original health of your hero will be set to 15 once you replace it with Lord Jaraxxus, meaning that summoning Molten Giant will cost more mana at Jaraxxus' 15 health (full health) than a warlock's 15 Health (down by 15 damage). This also means that it is not possible to heal Lord Jaraxxus above 15 health.
- Repentance: Reduces Jaraxxus' health to 1 instantly
- Snipe: Deals 4 damage to Jaraxxus instantly
- Sacrificial Pact: Destroys Jaraxxus
- Mirror Entity: Summons a 3/15 Lord Jaraxxus minion
 Blood Fury
Blood Fury has high durability and decent damage output, so you should be attacking with it every turn, unless your opponent has a minion with taunt out that can deal enough damage to Lord Jaraxxus to be problematic. This weapon can be very useful for removal, preventing your opponent from building an offensive force, but beware Jaraxxus' low health.
INFERNO! is the most powerful hero power in the game, summoning a fresh 6/6 Infernal each round for only 2 mana. Warlocks will generally want to use this as often as possible, allowing them to swarm the board with an army of powerful minions. Regular use of this often forces the opponent to use all their removal and defensive options simply to survive.
Lord Jaraxxus is an eredar lord of the Burning Legion and the second encounter of the Trial of the Crusader raid instance. Lord Jaraxxus is summoned by Grand Warlock Wilfred Fizzlebang when the gnome attempts to summon a doomguard for the next challenge. Jaraxxus kills Fizzlebang for his efforts.
- "Trifling gnome! Your arrogance will be your undoing!"
- "You face Jaraxxus, eredar lord of the Burning Legion!"
|Well played||WELL PLAYED!|
|Greetings||You face Jaraxxus, Eredar Lord of the Burning Legion!|
|Sorry||JARAXXUS IS... sorry.|
|Concede||You win... BUT YOUR WORLD IS STILL DOOMED!|
|Thinking ||I wonder...|
|Thinking ||How shall I destroy you...|
|Running out of time||TIME RUNS OUT!|
|Almost out of cards||My deck! IT'S RUNNING OUT OF CARDS!|
|Out of cards||NOOOOO! I'M OUT OF CARDS!|
|Error: Too many minions||TOO MANY MINIONS.|
|Error: Generic||CAN'T DO THAT.|
|Error: Hand already full||TOO MANY CARDS!|
|Error: Hero already attacked||I ALREADY ATTACKED.|
|Error: Minion not ready||IT JUST GOT HERE!|
|Error: Minion exhausted||THAT THING ALREADY ATTACKED.|
|Error: Not enough mana||NOT ENOUGH MANA!|
|Error: Need a weapon||WHERE DID MY WEAPON GO?|
|Error: Can't play that card||CAN'T PLAY THAT.|
|Error: Can't target stealthed minions||IT'S STEALTHED.|
|Error: Not a valid target||NOT VALID.|
|Error: Must attack taunt minion||THAT TAUNT MINION IS IN MY WAY!|
- Some of Lord Jaraxxus' audio from the Trial of the Crusader encounter have been reused as Jaraxxus' emotes in Hearthstone. Several of the audio files were also featured in Mr.Voletron's "You FACE Jaraxxus" remix.
- If you play him as a non-warlock (e.g. after acquiring him with Thoughtsteal), you'll get warlock XP for the game.