Necrotech Reaver 2014
CR 6 undead
Huge undead, neutral evil
STR21 (+5)
DEX7 (-2)
CON18 (+4)
INT3 (-4)
WIS8 (-1)
CHA7 (-2)
Siege Monster.
Double damage to objects/structures.
Undead Nature.
Doesn't require air food drink or sleep.
Unstable Footing.
Has disadvantage on saves vs. being knocked prone.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details