An apostate assassin who traded a temple's discipline for a blade and a spellbook, and now hunts whichever spellcaster in the crypt has the most power left to steal — the Ledger she keeps on them never really closes.
She rescans for the strongest caster present, marks them, and strikes - every hit on the Marked target (only) permanently banks a Death's Ledger stack.
The instant Death's Ledger reaches 5
Widow's Kiss
A big sneak-flavored detonation on the Marked target scaled by the full stack - then the Ledger resets to zero rather than being spent once and done, so a long fight can see it close and reopen more than once.
Once, at 25% hp or lower
Mummy Dust
Her granted Epic Spell, reflavored - two Grave-Bloom Wretches rise from the cathedral floor at her side.
Why These Numbers
Cathedral Level 3's real ceiling is Death, the Pale Rider at CR32 (Malchor Greywane's CR30 and the loot-protected bele_adgolem's CR28 both sit under him); Serathiel is pitched a notch above at CR33, its third boss. She's the bestiary's first Assassin - real minor spellcasting with no dedicated spells.2da column, drawn from Wiz_Sorc filtered to illusion/death flavor, same technique as every other non-domain-column caster. Widow's Kiss is the first repeatable capstone in this bestiary - every prior mark-and-bank mechanic pays out once and stops; hers can trigger multiple times in one long fight.
How It's Wired
pattern
new build — cloned from rwrogue (already ran real j_ai_* AI)