Benthic Reaver

Creature 21
uniqueChaoticColdEvilUndeadUnholy
Perception +41; Darkvision, Truesight
Skills Arcana +37, Athletics +43, Nature +37
CHA +6
CON +7
DEX +8
INT +6
STR +10
WIS +8

AC 46 (all-around vision); Fort +38, Ref +35, Will +33
HP 500 void healing
Resistances Physical 10
Weaknesses Holy 20
Speed 30 feet, Swim 60 feet

The benthic reaver is a 50-foot-tall undead monstrosity, its ribs rising like giant archways and its spine splitting into three tails.