Sources
CR
Type
Size
Alignment
Movement

Gray Render

Large Monstrosity, Chaotic Neutral

Armor Class 19 (natural armor)
Hit Points 189 (18d10 + 90)
Speed 30 ft.
STR
19
+4
DEX
13
+1
CON
20
+5
INT
3
-4
WIS
6
-2
CHA
8
-1
Saving Throws STR +8, CON +9
Skills Perception +2
Senses darkvision 60 ft., passive Perception 12
Languages
Challenge 12 (8,400 XP)

Actions

Multiattack. The gray render makes one Bite attack and two Claw attacks.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit:17 (2d12 + 4) piercing damage. If the target is Medium or smaller, the target must succeed on a DC 16 Strength saving throw or be knocked prone.

Claw. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit:13 (2d8 + 4) slashing damage, plus 10 (3d6) bludgeoning damage if the target is prone.

Reactions

Bloody Rampage. When the gray render takes damage, it makes one Claw attack against a random creature within its reach, other than its master.

Lore

A curious impulse drives the gray render. Despite its hulking form and terrible appetite, it wants most of all to bond with an intelligent creature and, once bonded, to give its life to protect that creature. Great strength and a ferocious nature make gray renders fierce guardians, but they lack a shred of cunning.