Vasal of the Seal vs Mordecai

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Vasal of the Seal	Demonspawn	Force	HP	Legendary	HP 33% Place: All battles
Mordecai	The Sacred Order	Force	Support	Epic	Accuracy 40 Place: All battles

Stats comparison

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Vasal of the Seal	60	6	21315	870	1288	98	15	50	40	20
Mordecai	60	6	13545 -7770	1244 +374	1156 -132	100 +2	15	50	30 -10	0 -20

Skills comparison

Vasal of the Seal	Abyssal Seal Formula: 0.25*HP Attacks 1 enemy. Places a [HP Burn] debuff on the target for 2 turns if they are under a [True Fear] debuff or a [Decrease ATK] debuff. Also places a [Shield] buff on this Champion for 2 turns equal to 10% of their MAX HP. Shield HP Burn	Infernal Darkness Formula: 0.27*HP Attacks all enemies. Has a 75% chance of placing a [True Fear] debuff and a 50% [Decrease ATK] debuff for 2 turns. Cooldown: 5 True Fear Decrease ATK 50%	Daemon Possession Balances the HP of all allies. The HP levels of all allies will be brought up to the level of the ally with the highest HP. After balancing HP, grants an Extra Turn. Cooldown: 6	Legion of Doom [P] Formula: -0.2DMG_MUL Formula: 0.2DMG_MUL Receives 20% less damage from Champions from the Banner Lord, High Elf, and Sacred Order Factions. If there are 2 or more Demonspawn Champions on the team alongside this Champion, increases the C. DMG of all Demonspawn Champions on the team by 20%. [C. DMG increase only works when this Champion is alive.]
Mordecai	Purgatory Formula: 3.8ATK Formula: 0.1MAX_STAMINA Formula: 0.1*MAX_STAMINA Attacks 1 enemy. Has a 30% chance of decreasing the target’s Turn Meter by 10%. Has a 60% instead if the target is under a [HP Burn] debuff.	Time's Undoing Formula: 0.15MAX_STAMINA Formula: 0.15MAX_STAMINA Has a 75% chance of decreasing the Turn Meters of all enemies by 15%. Fills the Turn Meters of all allies by 15%. Cooldown: 4	Heavenly Flames Has a 75% chance of placing a [HP Burn] debuff on all enemies for 2 turns. Places a 50% [Increase ATK] buff on all allies for 3 turns. Cooldown: 5 Increase ATK 50% HP Burn	-