★

Heiress

High Elves · Force · Rare

The Clan Boss unkillable-tune enabler: A2 Exhortation removes 1 random debuff from ALL allies (the Crushing Force stun answer) and places a 30% [Increase SPD] buff on the whole team, on a 3-turn cooldown — the buff Demytha's A2 extends to hold a 2:1 rotation together. Passive counterattacks whenever an ally is attacked.

HH 9/10 Clan Boss on a Rare — and effectively a one-comp champion: her other ratings top out at 4★. She is the 'Heiress' seat in HellHades' MythBusted / DeadwoodJedi MythHeiress unkillable tune (published 2021-10-15), where the guide's only listed substitutes are champions that also give the team an Increase SPD buff. Aura is +16% Ally SPD in DUNGEONS, which loses the leader slot to Akemtum's 18% in ALL battles — only one aura applies. Also a High Elves crypt body. Obtainable from Mystery/Ancient/Primal shards, Palace of Aravia and three fusions, so duplicates are realistic.

GearSpeed · Perception · Relentless · Reflex · Divine Speed · Resistance

StatsSPD › RES › HP% › DEF%

BuildBuild her for the TUNE, not for the ATK-nuker template Ayumilove lists — her value on this account is one skill. HellHades' MythBusted reference tune puts her at 264–266 SPD, moving first every rotation so the cleanse and the Increase SPD land before anyone else acts; substitute champions elsewhere in the comp shift that number, so re-run DeadwoodJedi's calculator rather than copying it. She needs no accuracy at all (she lands nothing on the enemy) and RES only to avoid being the champion the boss's debuffs stick to. Her Avenger passive counterattacks whenever an ally is attacked, which is free Warmaster procs against a boss that swings three times a cycle — but it is also uncontrolled damage, so check it against the tune.

BlessingPhantom Touch

Skill floorA2 Exhortation's four Buff/Debuff Chance books are MANDATORY for the unkillable tune — they take the Increase SPD from a 60% coin flip to 100%, and a missed buff breaks the rotation that turn. That is 4 Rare tomes out of the abundant pool; her full book-out is 8.