Coldheart vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Coldheart	Dark Elves	Void	Attack	Rare	-
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Coldheart	60	6	13710	1376	738	94	15	57	30	0
Gravechill Killer	60	6	13545 -165	1233 -143	892 +154	96 +2	15	50 -7	30	10 +10

Coldheart	Flurry of Arrows Formula: 0.7*ATK Attacks 4 times at random. Each hit has a 25% chance of placing a 100% [Heal Reduction] debuff for 2 turns. Heal Reduction 100%	Art of Pain Formula: 3.3*ATK Attacks all enemies. Has a 30% chance of placing a 50% [Decrease ACC] debuff for 1 turn. Places a 5% [Poison] debuff for 2 turns if the target is under a [Heal Reduction] debuff. Cooldown: 4 Decrease ACC 50% Poison 5%	Heartseeker Formula: TRG_HP0.1+ATK1.7 Formula: MAX_STAMINA Attacks 1 enemy. Decreases the target's Turn Meter by 100%. Has an extra 30% chance of inflicting a critical hit. Damage increases according to enemy MAX HP. Cooldown: 5
Gravechill Killer	Freezing Toxin Formula: 3.9*ATK Attacks 1 enemy. Has a 40% chance of placing a 5% [Poison] debuff for 1 turn. Poison 5%	Blood Chill Formula: 6.8*ATK Attacks 1 enemy. Has a 75% chance of placing a 30% [Decrease DEF] debuff for 2 turns. Has a 75% chance of placing a 60% [Decrease DEF] debuff instead if the target is under a [Poison] debuff. Cooldown: 4 Decrease DEF 60% Decrease DEF 30%	Icy Veins Formula: 2.65*ATK Attacks 1 enemy 2 times.Each hit places a 2.5% [Poison] debuff for 2 turns. Places a 5% [Poison] debuff instead if the target is under a [Poison Sensitivity] debuff. Cooldown: 5 Poison 2.5% Poison 5%