Boss Name Health (Heroic) Hero Power Heroic Hero Power
Anub'Rekhan (Heroic) 30 (45) Skitter - Summon a 3/1 Nerubian. Cost: 2 Skitter - Summon a 4/4 Nerubian. Cost: 2
Grand Widow Faerlina (Heroic) 30 (45) Rain of Fire - Fire a missile for each card in your opponent's hand. Cost: 2 Rain of Fire - Fire a missile for each card in your opponent's hand. Cost: 1
Maexxna (Heroic) 30 (45) Web Wrap - Return a random enemy minion to your opponent's hand. (Costs 2 Mana) Web Wrap - Return 2 random enemy minions to your opponent's hand.
Noth the Plaguebringer (Heroic) 30 (45) Raise Dead Passive - Whenever an enemy dies, raise a 1/1 Skeleton. Raise Dead Passive - Whenever an enemy dies, raise a 5/5 Skeleton.
Heigan the Unclean (Heroic) 30 (45) Eruption - Deal 2 damage to the left-most enemy minion. Cost: 1 Eruption - Deal 3 damage to the left-most enemy minion.
Loatheb (Heroic) 75 (99) Necrotic Aura - Deal 3 damage to the enemy hero. Cost: 2 Necrotic Aura - Deal 3 damage to the enemy hero.
Instructor Razuvious (Heroic) 40 (55) Unbalancing Strike - Deal 3 damage. Cost: 2 Unbalancing Strike - Deal 4 damage. Cost: 1
Gothik the Harvester (Heroic) 30 (45) Harvest - Draw a card. Cost: 2 Harvest - Draw a card. Gain a Mana Crystal. (Costs 1 Mana)
Baron Rivendare (Heroic) 7 (14) Unholy Shadow - Draw 2 cards. Cost: 5 Unholy Shadow - Draw 2 cards. Cost: 5
Patchwerk (Heroic) 30 (45) Hateful Strike - Destroy a minion. Cost: 4 Hateful Strike - Destroy a minion. Cost: 4
Grobbulus (Heroic) 30 (45) Poison Cloud - Deal 1 damage to all minions. If any die, summon a slime. (Costs 2 Mana) Poison Cloud - Deal 2 damage to all enemies. If any die, summon a slime.
Gluth (Heroic) 30 (45) Decimate - Change the Health of all minions to 1. (Costs 2 Mana) Decimate - Change the Health of enemy minions to 1.
Thaddius (Heroic) 30 (45) Polarity Shift - Swap Health and Attack of all minions. Polarity Shift - Swap Health and Attack of all minions.
Sapphiron (Heroic) 30 (45) Frost Blast - Deal 2 damage to the enemy hero and Freeze it. Frost Blast - Deal 3 damage to the enemy hero and Freeze it.
Frost Breath - Destroy all enemy minions that aren't Frozen. Frost Breath - Destroy all enemy minions that aren't Frozen.
Kel'Thuzad (Heroic) 30 (45) Chains - Take control of a random enemy minion until end of turn. Cost: 8 Chains - Take control of a random enemy minion. Cost: 8