Multiattack

One Bite and two Kicks or three Spit Worms.

Bite

Melee Weapon Attack: +9 to hit, 10 ft., one creature,. 18 (3d8+5) piercing damage + 7 (2d6) poison and target must make DC 16 Con save or be infested with parasitic cheek worm (see above) if grivid has at least 1 cheek worm.

Kick

Melee Weapon Attack: +9 to hit, 5 ft., one creature,. 18 (3d8+5) bludgeoning damage and target must make DC 16 Str save or be knocked prone.

Spit Worm

Ranged Weapon Attack: +7 to hit 20/60' one creature. 13 (3d6+3) bludgeoning damage + 7 (2d6) poison and target: DC 16 Con save or be infested with parasitic cheek worm (see above) if grivid has at least 1 cheek worm.