Multiattack. The medusa makes two Claw attacks and one Snake Hair attack, or it makes three Poison Ray attacks.
Claw. Melee Attack Roll: +6, reach 5 ft. Hit: 10 (2d6 + 3) Slashing damage.
Snake Hair. Melee Attack Roll: +6, reach 5 ft. Hit: 5 (1d4 + 3) Piercing damage plus 14 (4d6) Poison damage.
Poison Ray. Ranged Attack Roll: +5, range 150 ft. Hit: 11 (2d8 + 2) Poison damage.
Petrifying Gaze (Recharge 5–6). Constitution Saving Throw: DC 13, each creature in a 30-foot Cone. If the medusa sees its reflection in the Cone, the medusa must make this save. First Failure: The target has the Restrained condition and repeats the save at the end of its next turn if it is still Restrained, ending the effect on itself on a success. Second Failure: The target has the Petrified condition instead of the Restrained condition.