Valkyrie vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Valkyrie	Barbarians	Spirit	Defence	Legendary	Defence 33% Place: Crypts
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Valkyrie	60	6	17835	793	1597	104	15	50	50	0
Gravechill Killer	60	6	13545 -4290	1233 +440	892 -705	96 -8	15	50	30 -20	10 +10

Valkyrie	Denigration Formula: 1.7ATK+0.6DEF Formula: 0.1*MAX_STAMINA Attacks 1 enemy 2 times. Decreases Turn Meter by 10% on each hit if the target has any buffs.	Stand Firm Formula: 3*DEF Attacks all enemies. Places a [Shield] buff on all allies for 3 turns and a [Counterattack] buff on all allies for 2 turns. The value of the [Shield] and the damage inflicted are proportional to this Champion's DEF. Cooldown: 4 Shield Counterattack	Jealousy [P] Formula: 0.1MAX_STAMINA Formula: 0.1MAX_STAMINA This Champion's Turn Meter will be increased by 10% each time an enemy Champion places a buff. Enemy Champions will have their Turn Meters decreased by 10% for each buff they receive.
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%