A named threat of Flooded Caverns, encountered rarely and never in numbers - real Dungeons & Dragons statistics, no auto-computed shortcuts.
| Level | Known / Prepared |
|---|---|
| 1 | Magic Missile |
| 2 | Gust of Wind |
| 3 | Haste |
| 4 | Improved Invisibility |
| 5 | Poison |
| 9 | Epic Mage Armor |
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.
He never changes what he casts - only how.
The bolt's own roll is bettered, then simply maxed outright.
A lingering tail joins the bolt, and below a quarter health it fires twice a round.
CR 21 is set against Flooded Caverns's own real ambient ceiling, not auto-computed from level alone - a genuine Wizard 16 / Archmage 5 build at 21 total levels.
Hit points (168) 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 Xanthir Mor is ever up in Flooded Caverns at a time.