Multiattack

The kuunganisha makes one claw attack and one bite attack.

Bite

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage, and the target must succeed on a DC 13 Constitution saving throw or take 5 (2d4) poison damage and become poisoned for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Claw

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (2d4 + 3) slashing damage.

Invisibility

The kuunganisha magically turns invisible until it attacks, or until its concentration ends (as if concentrating on a spell). Any equipment the fiend wears or carries becomes invisible with it.