Kalvalax vs Pain Keeper

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Kalvalax	Knight Revenant	Spirit	Attack	Legendary	Speed 19% Place: All battles
Pain Keeper	Dark Elves	Void	HP	Rare	HP 21% Place: Crypts

Stats comparison

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Kalvalax	60	6	12720	1663	1068	99	15	63	30	10
Pain Keeper	60	6	19320 +6600	969 -694	771 -297	102 +3	15	50 -13	40 +10	0 -10

Skills comparison

Kalvalax	Oozing Greatsword Formula: 3.5ATK Formula: EffectsAppliedOnRelationTargetCountOfKind(ContinuousDamage_KindId)0.025*HP Attacks 1 enemy. Has a 40% chance of increasing the duration of all [Poison] debuffs on the target by 1 turn. Heals this Champion by 2.5% of their MAX HP for each [Poison] debuff on the target.	Corruption Locus Formula: 2*ATK Formula: EffectsAppliedOnRelationTargetCountOfKind(ContinuousDamage_KindId) Attacks 1 enemy. Places an extra hit for each [Poison] debuff on the target (up to 3 extra hits). Cooldown: 3	Storm of Vitriol Formula: (3.5ATK)+(EffectsAppliedOnTargetCountOfKind(ContinuousDamage_KindId)0.01*TRG_HP) Attacks all enemies. Damage increases according to the number of [Poison] debuffs on each target. Cooldown: 4	Pestilence [P] Places four 5% [Poison] debuffs on all enemies for 2 turns at the start of each round. Has a 50% chance of placing a 5% [Poison] debuff on all enemies for 1 turn at the start of each turn. Whenever an enemy places a [Poison] debuff on this Champion, instantly removes it and replaces it with a 15% [Continuous Heal] buff for 2 turns instead. Cooldown: 1 Continuous Heal 15% Poison 5%
Pain Keeper	Unflagging Advance Formula: DEF+ATK Formula: 0.1*MAX_STAMINA Attacks 1 enemy 2 times. Fills this Champion's Turn Meter by 10%.	Spectacular Sweep Formula: 0.12HP+2ATK Formula: 0.15*HP Attacks all enemies, then heals all allies by 15% of this Champion's MAX HP. Cooldown: 5	Combat Tactics Decreases the cooldowns of all ally skills by 1 turn. This skill can have its cooldown reduced by other skills that reduce cooldowns by 1 turn. Cooldown: 7	-