Coffin Smasher vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Coffin Smasher	Knight Revenant	Magic	HP	Rare	-
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Coffin Smasher	60	6	21135	683	936	92	15	50	40	0
Gravechill Killer	60	6	13545 -7590	1233 +550	892 -44	96 +4	15	50	30 -10	10 +10

Coffin Smasher	Mallet Crescendo Formula: 0.06*HP Attacks 1 enemy 3 times. Each hit has a 15% chance of placing a 50% [Decrease ATK] debuff for 2 turns. Decrease ATK 50%	Tombfire Formula: 0.22*HP Attacks 1 enemy. Has a 50% chance of placing a [HP Burn] debuff for 2 turns. Cooldown: 4 HP Burn	Gloom Mist [P] Formula: -0.05*DMG_MUL Decreases the damage enemies inflict with AoE attacks by 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%