Vasal of the Seal vs Keberon the Underflame

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Vasal of the Seal	Demonspawn	Force	HP	Legendary	HP 33% Place: All battles
Keberon the Underflame	Argonites	Force	Attack	Legendary	Attack 28% 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
Keberon the Underflame	60	6	15030 -6285	1454 +584	1123 -165	99 +1	15	63 +13	30 -10	10 -10

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.]
Keberon the Underflame	Fiery Rend Formula: 1.8*ATK Attacks 1 enemy 2 times. Has a 75% chance of placing a 60% [Decrease DEF] debuff for 2 turns. Has a 50% chance of attacking with this skill whenever an enemy has a [HP Burn] debuff activated on them. Occurs once per turn. Decrease DEF 60%	Searing Brand Formula: 2.8ATK Formula: 0.5MAX_STAMINA Attacks 1 enemy 2 times. Before attacking, places a [Deathbrand] debuff on the target for 2 turns. Will ignore [Unkillable] and [Shield] buffs, as well as 25% of the target’s DEF. Activates this Champion’s Pyrenei Power skill if the target is killed. If the target survives, fills this Champion’s Turn Meter by 50% instead. Cooldown: 4 Deathbrand	Pyrenei Power Formula: 4.5ATK Formula: 0.2MAX_STAMINA Formula: 0.1*MAX_STAMINA Attacks all enemies. Before attacking, places a 50% [Increase ACC] buff on all allies for 2 turns. Has a 75% chance of placing a [HP Burn] debuff on all enemies for 2 turns. Fills this Champion’s Turn Meter by 20% for each [HP Burn] debuff placed on enemies, and fills this Champion's Turn Meter by 10% for each [HP Burn] debuff resisted by enemies. Cooldown: 4 Increase ACC HP Burn	Underflame's Protection [P] Formula: 0.2*HP [Active Effect] Activates a [Delay] effect on this Champion whenever they receive a fatal hit. [Passive Effect] Heals this Champion by 20% of their MAX HP whenever a [HP Burn] debuff is activated on an enemy. Whenever a [HP Burn] debuff on an enemy expires or is removed, places a [True Fear] debuff on that enemy for 1 turn. Cooldown: 4 True Fear