Vasal of the Seal — guide

In short

Vasal of the Seal is a Legendary HP-role support from the Demons faction with Force affinity. His job is True Fear plus 50% Decrease ATK on the whole enemy team, HP equalisation for the party and a Shield on himself — and all of his damage scales off HP. Build him when you need a tanky Demon for Clan Boss, Hydra and Faction Wars.

Strengths

• Hellish Darkness is team-wide control: True Fear and 50% Decrease ATK for 2 turns on all enemies, 75% base chance that tomes push to 100%.
• Spirit Possession equalises every ally's HP to the healthiest champion and grants an extra turn — a massive safety net and a combo enabler.
• Seal of the Abyss places HP Burn for 2 turns if the target already has True Fear or Decrease ATK (his own A2 sets that up) and gives him a Shield worth 10% of his MAX HP.
• Legion (passive): 20% less damage from Banner Lords, High Elves and Sacred Order, and +20% C.DMG to all Demons when 2+ Demons are on the team.
• Every hit scales off HP, so one stat covers both survivability and damage.

Weaknesses

• 98 base SPD is slow — without Speed gear he acts last.
• Only 20 base ACC, so his debuffs simply won't land on bosses without Accuracy investment.
• Support-level multipliers (0.25×/0.27× HP): he is not a damage dealer.
• The C.DMG part of the passive needs 2+ Demons, and the damage reduction only covers three factions.
• The author does not recommend him for PvP.

Where to use

Clan Boss (4.0) and Faction Wars (4.0) come first — Fear and Decrease ATK cut boss damage and Legion buffs Demon teams. Hydra (3.5), Chimera (3.5), Doom Tower (3.5) and Arena (3.5) are workable but not exciting. Dungeons (3.0) and especially Hard mode (2.0) are his weak spots, where he lacks Speed and damage.

Stats and gear

Priority: HP% → ACC → SPD → DEF% / RES. Targets: 60–80k+ HP, 200–250 ACC for Clan Boss and 300+ for Doom Tower and Hydra, 170–200 SPD, DEF% as a secondary. Do not invest in C.RATE or C.DMG — his damage comes from HP. The author's build list has no artifact sets, only relics; from general knowledge, HP, Perception and Speed sets fit.

Masteries and blessings

The author lists a PvE set for Dungeons, Clan Boss, Doom Tower and Faction Wars: In For The Kill, Invigorated, Targetfinder, Expeditious Exploitation, Gathering Momentum. There is no separate PvP set and the champion is not recommended for Arena. No specific blessing is given in the list.

Tomes

Book Hellish Darkness first: the upgrades add +10% and +15% debuff chance (up to 100%) plus two cooldown reductions — that is his biggest power spike. Then Spirit Possession for its two cooldown reductions so the HP equalise and extra turn come up more often. Seal of the Abyss last, its books only add damage.

Verdict

A solid control support for Clan Boss and Faction Wars — worth building if you need a tanky Demon with team-wide True Fear and Decrease ATK, but don't expect damage from him.