A named threat of Cathedral Level 2, encountered rarely and never in numbers - real Dungeons & Dragons statistics, no auto-computed shortcuts.
Layered on top of the module's own combat AI, which still picks targets and positioning. The fight below moves through real hit-point-gated phases; every save DC and attack bonus computes from the stat block above at runtime.
Fights straightforwardly as a real Ranger 4 / ShadowbaneInquisitor 6, testing the party's own line before pressing further.
Presses the advantage harder, trading caution for tempo.
Commits everything left rather than falling with anything held in reserve.
CR 10 is set against Cathedral Level 2's own real ambient ceiling, not auto-computed from level alone - a genuine Ranger 4 / ShadowbaneInquisitor 6 build at 10 total levels.
Hit points (80) follow this project's own average-hit-dice convention, and every save/attack bonus derives from the ability scores above at runtime - nothing here is hardcoded past the phase gates themselves.
Boss-flagged (bypasses the drop-rate roll, two loot-generation passes) and gated to a single spawn - only one Dame Ysabeau Thorne is ever up in Cathedral Level 2 at a time.