A massive, ghostly serpent manifests, hovering 10 feet off the ground in an unoccupied space you can see within range. Until the spell ends, you can command the snake to attack a creature within 30 feet of the snake. The creature must make a dexterity saving throw, taking 6d8 poison damage on a failed save, or half as much on a successful one.

When you cast this spell using a spell slot of 4th level or higher, the spell's damage increases by 1d6 for each spell slot above 3rd.