Star Spawn Grue

Small Aberration, Neutral Evil

AC: 11

Initiative: +1 (11)

HP: 17 (5d6)

Speed: 30 ft.

STR: 6 (-2)
DEX: 13 (+1)
CON: 10 (+0)
INT: 9 (-1)
WIS: 11 (+0)
CHA: 6 (-2)

Immunities: psychic

Senses: darkvision 60 ft., Passive Perception 10

Languages: Deep Speech

CR: 1/4 (XP 50; PB +2)

Habitat: Mountain, Swamp

Aura of Shrieks.

Creatures within 20 feet of the grue that aren't Aberrations have disadvantage on saving throws, as well as on attack rolls against creatures other than a star spawn grue.

Actions

Confounding Bite.

Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 6 (2d4 + 1) piercing damage, and the target must succeed on a DC 10 Wisdom saving throw or attack rolls against it have advantage until the start of the grue's next turn.

Find this creature in the encounter builder

Source: Mordenkainen Presents: Monsters of the Multiverse, p. 227 - Licenses and attribution