Cagebreaker vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Cagebreaker	Ogryn Tribes	Spirit	Attack	Epic	Attack 40% Place: All battles Element: Spirit
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Cagebreaker	60	6	16020	1409	826	98	15	60	30	0
Gravechill Killer	60	6	13545 -2475	1233 -176	892 +66	96 -2	15	50 -10	30	10 +10

Cagebreaker	Shatter Shell Formula: 3.8*ATK Attacks 1 enemy. Has a 40% chance of placing a 60% [Decrease DEF] debuff for 2 turns. Decrease DEF 60%	Crunch Frenzy Formula: 1.4*ATK Attacks 4 times at random. Each hit has a 40% chance of placing a [Sleep] debuff for 1 turn. Cooldown: 4 Sleep	Burn Away Formula: 3.5ATK Formula: 0.5DEALT_DMG Attacks all enemies. Destroys each target's MAX HP by 50% of the damage inflicted. Grants an Extra Turn if this attack kills an enemy. 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%