Skullcrusher vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Skullcrusher	Ogryn Tribes	Force	Defence	Epic	Resist 45 Place: Crypts
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Skullcrusher	60	6	19320	826	1189	98	15	50	45	0
Gravechill Killer	60	6	13545 -5775	1233 +407	892 -297	96 -2	15	50	30 -15	10 +10

Skullcrusher	Smash Formula: 3.7*DEF Attacks 1 enemy. Places a 50% [Heal Reduction] debuff if the target's DEF is lower than this Champion's. Heal Reduction 50%	Stonewall Places a 50% [Ally Protection] buff on all allies except this Champion for 2 turns. Places a [Counterattack] buff on all allies except this Champion for 2 turns. Places an [Unkillable] buff on this Champion for 1 turn. Cooldown: 4 Unkillable Counterattack Ally Protection 50%	Unshakeable [P] Decreases the duration of all debuffs on this Champion by 1 turn at the start of each turn.
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%