Reliquary Tender vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Reliquary Tender	High Elves	Void	Support	Rare	-
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Reliquary Tender	60	6	18165	859	958	103	15	50	30	0
Gravechill Killer	60	6	13545 -4620	1233 +374	892 -66	96 -7	15	50	30	10 +10

Reliquary Tender	Warden Staff Formula: 3*ATK Attacks 1 enemy. Has a 20% chance of placing a 25% [Decrease ATK] debuff for 2 turns. Decrease ATK 25%	Tender's Watch Removes all debuffs from all allies, then places a 15% [Continuous Heal] buff on them for 2 turns. Cooldown: 5 Continuous Heal 15%	Call to Life Formula: 0.3TRG_HP Formula: 0.3MAX_STAMINA Revives an ally with 30% HP and fills their Turn Meter by 30%. Cooldown: 6
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%