A deluge of green slime falls in a 10-foot-radius, 20-foot-high cylinder centered on a point within range, covering creatures and objects with patches of green slime.
Each creature in the deluge must make a Dexterity saving throw. A creature is covered in 1d4 patches of green slime on a failed save, or half as many patches on a successful one (rounded down). The patches of green slime remain attached until a creature scrapes each patch off with a sharp implement or the duration expires, after which the patches dissolve into harmless puddles of green goo.
The GM has the statistics for green slime (Page 105 of the DMG)
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the number of patches of green slime increases by one for each spell slot level above 3rd.
* - (A vial of green slime)