Casts When Drawn

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Casts When Drawn is an ability on spells which activates when the spell is drawn from the deck, causing the spell to be cast instantly, without spending any Mana. After it resolves, the player draws another card to replace the cast spell in their hand so that they do not miss their draw.

Casts When Drawn is featured exclusively on spells that are shuffled into a player's deck via other cards. Some cards with Casts When Drawn are shuffled into the opponent's deck, with negative effects once drawn; other cards are shuffled into the player's own deck, with positive effects for the player.

Casts When Drawn is distinguished from general draw-related triggered effects, which activate when any card is drawn.

Notes[edit | edit source]

  • Casts When Drawn is only activated through successful card draw. Overdrawing a Casts When Drawn card will not activate its on-draw effect.[4][5]
  • Casts When Drawn is not activated if the card is removed from play, such as through being removed from the deck or discarded by Tracking.[6][7][8]
  • Casts When Drawn effects reveal the card to both players, at the moment when the effect takes place. The card is then added to the player's hand (unless the on-draw effect has itself destroyed the card) and cast.
  • Cards drawn due to Casts When Drawn cards replacing themselves can themselves activate Casts When Drawn effects for the cards they draw. This process can repeat indefinitely, potentially creating a lengthy chain of on-draw effects.[9]
  • Casts When Drawn cards can be seen to occupy a space in the player's hand prior to their activation, suggesting that their effects are in fact a special type of in-hand effect.
  • This keyword is unique to spells. Other on-draw effects, like that of Flame Leviathan, do not use this keyword since the cards are not "casted" when drawn.

Cards[edit | edit source]

For Wild format listings, see Casts When Drawn/Wild format
Name / Desc Rarity Type Subtype Class Cost Atk HP Description
Bomb None Spell Any 1
Casts When Drawn
You take 5 damage. 
Corrupted Blood None Spell Any 1
Casts when Drawn
Take 3 damage. After you draw, shuffle two copies of this into your deck. 
Darkness Candle None Spell Any 4
Casts When Drawn
Snuff out a candle. 
Scroll of Wonder None Spell Mage 5
Casts When Drawn
Cast a random spell. 
Spider Ambush! None Spell Rogue 4
Casts When Drawn
Summon a 4/4 Spider. 
Showing all 5 cards
Bomb(89894).png
Corrupted Blood(90191).png
Darkness Candle(76988).png
Scroll of Wonder(76943).png
Spider Ambush!(76915).png


Strategy[edit | edit source]

  • Due to the nature of card draw, Casts When Drawn cards are difficult to predict or prevent. This can make it hard to plan around their useful effects, or give the player a chance to evade their drawbacks.
  • There are a few ways players can avoid activating enemy on-draw effects that have been shuffled into their decks. Tracking is particularly useful for this, neutralizing any on-draw effects displayed. However, the most common way is to intentionally maintain a full hand, causing any further cards to be overdrawn. While drastic, this can be an effective strategy and in the right circumstances a desirable trade off, such as if facing lethal from a Burrowing Mine while the opponent's hand and board are empty. This is most viable for control decks, and is especially relevant for Freeze Mages trying to prevent a Burrowing Mine from circumventing their Ice Block. More aggressively, Fel Reaver can be intentionally employed to mill the player's own deck.

Patch changes[edit | edit source]

References[edit | edit source]

  1. Ben Brode on Twitter. (2014-12-02). 
  2. Zeriyah on Twitter. (2015-03-30). 
  3. Zeriyah on Twitter. (2015-03-30). 
  4. Whirthun on Twitter. (2015-08). 
  5. Zeriyah on Twitter. (2014-12-02). 
  6. Whirthun on Twitter. (2015-08-20). 
  7. Zeriyah on Twitter. (2014-12-02). 
  8. Ben Brode on Twitter. (2014-12-03). 
  9. Today In Hearthstone Ep. 145 Ambush. (2016-02-21).