Vasal of the Seal vs Duchess Lilitu

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Vasal of the Seal	Demonspawn	Force	HP	Legendary	HP 33% Place: All battles
Duchess Lilitu	Demonspawn	Spirit	Support	Legendary	Speed 19% 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
Duchess Lilitu	60	6	22470 +1155	793 -77	1288	103 +5	15	50	50 +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.]
Duchess Lilitu	Abyssal Invocation Formula: 1.7*DEF Attacks 1 enemy 2 times, then places a [Shield] buff equal to 10% of this Champion’s MAX HP for 2 turns on this Champion and the ally with the lowest HP. Shield	Shroud of Souls Places a [Block Debuffs] buff and a 50% [Increase ATK] buff on all allies for 2 turns. Places a [Perfect Veil] buff on all allies except this Champion for 2 turns. Cooldown: 5 Increase ATK 50% Block Debuffs Perfect Veil	Spectral Rebirth Formula: 0.7*TRG_HP Revives all dead allies with 70% HP. Places a [Veil] buff on all allies except this Champion for 1 turn. Places a 15% [Continuous Heal] buff on all allies for 2 turns. Cooldown: 6 Continuous Heal 15% Veil	Ethereal Ways [P] Formula: -0.15DMG_MULrelationProducerIsBoss+-0.25DMG_MUL!relationProducerIsBoss Decreases the damage taken by all allies from AoE attacks by 25% (15% from Bosses).