Fireblade vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Fireblade	Banner Lords	Spirit	Attack	Uncommon	-
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Fireblade	60	6	10080	1178	903	95	15	50	30	0
Gravechill Killer	60	6	13545 +3465	1233 +55	892 -11	96 +1	15	50	30	10 +10

Fireblade	Burning Spear Formula: 100+3.1*ATK Attacks 1 enemy. Places a 25% [Decrease ATK] debuff for 2 turns if this attack is critical. Decrease ATK 25%	Path of Flame Formula: 2.3*ATK Attacks 1 enemy 3 times. Each hit has a 30% chance of placing a 2.5% [Poison] debuff for 2 turns. Cooldown: 4 Poison 2.5%	-
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%