Multiattack

The snake with a hundred mage hands makes two bite attacks.

Bite

Melee Weapon Attack: +6 to hit, reach 5 ft. creature. Hit: 9 (2d4 + 4) piercing damage.

Flying Fists (Recharge 5-6)

The snake unleashes a flurry of spectral punches in a 30-foot cone. Each creature in the area must make a DC 14 Dexterity saving throw. On a failure, a creature takes 10 (3d6) bludgeoning damage and is knocked prone. On a success, a creature takes half the damage and isn't knocked prone.