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Set:Knights of the Frozen ThroneKnights of the Frozen Throne
Spell school:Shadow
Cost:3 Mana icon.png
Abilities:Take control
Wiki tags:Targeted
Artist:Jim Nelson
Choose a friendly minion. Your opponent gains control of it.
Flavor text

Never look a gift minion in the mouth.

External links

Data pagePlayHearthstoneHearthpwn

Treachery is an epic warlock spell card, from the Knights of the Frozen Throne set.

How to get[]

Treachery can be obtained through Knights of the Frozen Throne card packs, or through crafting.

Card Crafting cost Disenchanting
Treachery 400 100
Golden Treachery 1600 400

Known bugs[]

  • When you use Treachery to give your opponent an Alarm-o-Bot, its effect will not activate at the start of your opponent's next turn, but rather one turn later.[1]


The main purpose of this card is to give a minion with a negative Deathrattle, end-of-turn, or triggered effect to the opponent and force them to suffer its effect instead. Some of the cards that make good use of Treachery include:

  • Doomsayer: Clears the board for 5 Mana. While it won't give you a tempo shift like Doomsayer normally would, it counters Deathrattles that only activate on the opponent's turn, like Skelemancer.
  • Ticking Abomination: Heavily damages the enemy board. This effect lacks a true one-turn combo (barring an inefficient Bloodbloom + Blastcrystal Potion combo), so it will require a board setup.
  • Keening Banshee: Could be used to force the enemy to lose cards from their deck, or make unfavorable trades.
  • Howlfiend: Makes the opponent discard their hand. Can be combined with Defile or Dark Skies to empty out the opponent's hand.
  • Bittertide Hydra: Similar concept as above, but with damage instead. This combo costs 2 more mana, so you will need to set up your board first to exploit it.
  • Unlicensed Apothecary: Can be used with Leeroy Jenkins to deal 10 extra damage, although this combo can't be played in a single turn. Can be combined with Diseased Vulture and Curse of Rafaam to deal up to 25 damage.
  • Rattling Rascal: Trades a 2/2 for a 5/5, giving you two 5/5s at the cost of giving the opponent a 2/2.
  • Fel Reaver: With a large number of low-cost cards, this combo can be used to mill most or all of the opponent's deck.
  • Master Chest: You get the reward from its Deathrattle instead of your opponent.
  • Octosari: Very likely mills the opponent. Devastating if you can also give them Baron Rivendare.
  • Wrathguard or Soulbound Ashtongue: Allows minion-only damage to affect the opponent's hero. This can be very powerful with multiple Mo'arg Artificers in play.
  • Harbinger Celestia: Can be used together with any of the above (like one that costs more than 4, or a legendary) to Treachery both of them, doubling the impact (but it is harder too).



Treachery, full art

Original color rough of Treachery.

Patch changes[]