Rot Harbinger
Medium elemental humanoid (undead)
Level 20 Soldier XP 2800

Initiative +18        Senses Perception +15
HP 193; Bloodied 96
AC 34; Fortitude 32, Reflex 32, Will 31
Immune disease, poison; Resist 10 necrotic
Speed 6, fly 8 (clumsy)

(⚔) Rotting Claw (standard, at-will) ✦ Necrotic

+25 vs AC; 2d10+6 damages, and the target is marked until the end of the rot harbinger's next turn and takes ongoing 10 necrotic damage (save ends).

Alignment Chaotic evil        Languages Abyssal
Str 22 (+16)      Dex 22 (+16)      Wis 20 (+15)
Con 25 (+17)      Int 17 (+13)      Cha 17 (+13)

Published in Monster Manual, page(s) 223, Dungeon Delve, page(s) 127, E2 Kingdom of the Ghouls, page(s) 11, P3 Assault on Nightwyrm Fortress, page(s) 14.