Sources
CR
Type
Size
Alignment
Movement

Grimlock

Medium Humanoid (grimlock), Neutral Evil

Armor Class 11
Hit Points 11 (2d8 + 2)
Speed 30 ft.
STR
16
+3
DEX
12
+1
CON
12
+1
INT
9
-1
WIS
8
-1
CHA
6
-2
Skills Athletics +5, Perception +3, Stealth +3
Condition Immunities Blinded
Senses blindsight 30 ft. or 10 ft. while deafened (blind beyond this radius), passive Perception 13
Languages Undercommon
Challenge 1/4 (50 XP)

Traits

Blind Senses. The grimlock can't use its blindsight while deafened and unable to smell.

Keen Hearing and Smell. The grimlock has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Stone Camouflage. The grimlock has advantage on Dexterity (Stealth) checks made to hide in rocky terrain.

Actions

Spiked Bone Club. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:5 (1d4 + 3) bludgeoning damage plus 2 (1d4) piercing damage.

Lore

The degenerate subterranean grimlocks were once human, but their worship of the mind flayers over generations of prowling the Underdark transformed them into blind, monstrous cannibals long ago.