Multiattack

The carbuncle makes one bite attack and one claw attack.

Bite

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) piercing damage.

Claw

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) slashing damage.

Light Beam (Recharge 5-6)

The carbuncle shoots a 30-foot-long, 5-foot-wide line of scintillating light from the garnet on its forehead. Each creature in that line must make a DC 13 Dexterity saving throw, taking 10 (3d6) radiant damage on a failed save, or half as much damage on a successful one.