Vasal of the Seal vs Valla

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Vasal of the Seal	Demonspawn	Force	HP	Legendary	HP 33% Place: All battles
Valla	Barbarians	Spirit	Defence	Epic	Resist 45 Place: Arena

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
Valla	60	6	16845 -4470	771 -99	1409 +121	99 +1	15	60 +10	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.]
Valla	Piercing Blade Formula: 1.55DEF Formula: 0.15DMG_MUL Attacks 1 enemy 2 times. Increases the inflicted damage by 15% if the target is under a [Shield] buff.	Crush The Wall Formula: 3.8*DEF Removes all [Shield] buffs on all enemies, then attacks all enemies. Has a 30% chance of placing a 60% [Decrease DEF] debuff on all enemies for 2 turns. Cooldown: 4 Decrease DEF 60%	Fortified Core Formula: 0.5*MAX_STAMINA Places a [Shield] buff on this Champion for 3 turns equal to 20% of their MAX HP. Also places a 60% [Increase DEF] buff on this Champion for 3 turns and fills this Champion’s Turn Meter by 50%. Cooldown: 4 Shield Increase DEF 60%	Resolute Defense [P] Formula: -0.15*DMG_MUL Decreases the damage received by this Champion by 15% while under a [Shield] buff.