Tainted Klyssus

Glacial Eruption
Attacks all enemies.
Debilitating Frost
Attacks all enemies. Places a 50% Decrease ACC debuff for 2 turns. Decreases the Turn Meters of all enemies by 30%.
Also removes all debuffs from Tainted Klyssus. (recharge: 4)
Frozen Reckoning [P]
Attacks all enemies 1 time whenever Tainted Klyssus's HP drops below 80%, 60%, 45%, 30%, and 15%. This attack will revive any dead allies to 100% HP. This attack will ignore 50% of each enemy's DRF for each alive ally. This attack also has a 20% chance of placing a Freeze debuff for 1 turn. The chance of placing a Freeze debuff increases by 40% for each alive ally.
Winter's Power [P]
Immune to Poison and Poison Sensitivity debuffs. Receives 10% more damage from HP Burn debuffs,
Whenever a HP Burn debuff is activated on Tainted Klyssusor his minions, destroys the minions' Max HP by 5%. Whenever a Smite debuff is activated on Tainted Klyssus or his minions, destroys the minions' MAX HP by 10%. Destroyed MAX HP cannot exceed 50%.
Tainted Immunity [P]
Immune to Stun, Freeze, Sleep, Provoke, Block Active Skills, Block Passive Skills, Fear, True Fear, and Petrification debuffs. Also immune to HP exchange effects, HP balancing effects, and cooldown increasing effects.
Awakened Weakness [P]
Decreases the damage inflicted by the Boss for each Awakening Level on the Target Champion (2.5% for Levels 1-2 and 5% for Levels 3-6, stacks up to 25%).
Increases the damage inflicted by the Boss for each Awakening Level on the Target Champion (5% for Levels 1-2 and 10% for Levels 3-6, stacks up to 50%).
Almighty Strength [P]
Damage from skills that scale based on enemy MAX HP cannot exceed 10% of the Boss' MAX HP when attacking the Boss.