Star Spawn Grue

Small aberration, Lawful Evil

Armor Class 11

Hit Points 17 (5d6)

Speed 30 ft.

STR 6 (-2)

DEX 13 (+1)

CON 10 (+0)

INT 9 (-1)

WIS 11 (+0)

CHA 6 (-2)

Damage Immunities psychic

Senses darkvision 60 ft., passive Perception 10

Languages Deep Speech

Challenge 1/4

Aura of Madness. 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.

Source

Mordenkainen's Tome of Foes, p. 234