Mighty Ukko vs Vasal of the Seal

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Mighty Ukko	Skinwalkers	Force	Support	Legendary	Speed 20% Place: All battles
Vasal of the Seal	Demonspawn	Force	HP	Legendary	HP 33% Place: All battles

Stats comparison

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Mighty Ukko	60	6	18495	1233	1112	109	15	50	30	10
Vasal of the Seal	60	6	21315 +2820	870 -363	1288 +176	98 -11	15	50	40 +10	20 +10

Skills comparison

Mighty Ukko	Ukko Smash Formula: 2.5*ATK Attacks all enemies. Has a 50% chance of placing a 50% [Decrease ATK] debuff for 2 turns. Reflect Damage 15% Decrease ATK 50%	Ukko's Fury Formula: 2ATK Formula: 2ATK Attacks all enemies 2 times. Each hit has a 75% chance to remove 2 random buffs from the target. Places a [Block Buffs] debuff and a 50% [Decrease ACC] debuff for 2 turns on targets that have no buffs after the attack. Cooldown: 4 Block Buffs Decrease ACC 50%	Ukko's Mercy Formula: 0.4*TRG_HP Revives all dead allies with 40% HP, then places a [Block Damage] buff on them for 1 turn. Also places a 30% [Increase SPD] buff on all allies for 2 turns. Will place the [Increase SPD] buff even if there are no dead allies. Cooldown: 6 Block Damage Leech Provoke Increase SPD 30%	Totem Warden [P] Has a 50% chance of stealing 1 random buff from a random enemy each time a buff is placed on the enemy team. Will only attempt to steal one buff for each type of buff placed simultaneously (for example, only one random buff may be stolen if 3 [Shield] buffs are placed at the same time). Any stolen buffs become protected. Decrease ATK 25% Decrease ACC 50%
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.]