Runic Warder vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Runic Warder	Dwarves	Magic	HP	Rare	-
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Runic Warder	60	6	19155	848	903	103	15	50	55	0
Gravechill Killer	60	6	13545 -5610	1233 +385	892 -11	96 -7	15	50	30 -25	10 +10

Runic Warder	Twin Chops Formula: 0.1*HP Attacks 1 enemy 2 times.	Superior Steel Formula: 0.15*HP Attacks 1 enemy 2 times. Each hit has a 30% chance of placing a 50% [Decrease ATK] debuff for 2 turns. Cooldown: 3 Decrease ATK 50%	Rune of Outlasting Places a 15% [Reflect Damage] buff and a 7.5% [Continuous Heal] buff on all allies for 2 turns. Cooldown: 5 Continuous Heal 7.5% Reflect Damage 15%
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%