Wave of Ooze

You summon a wave of slime from the para-elemental plane of ooze to crash into your foes. The wave is 15 ft. wide and 10 ft. high and travels for 40 ft. in a straight line in a direction you choose. Creatures caught in the wave’s path must make a Dexterity saving throw or take 5d6 acid damage, or half that much on a successful saving throw. Creatures behind total cover take no damage. The area the wave passed through, as well as all creatures that failed their saving throws, become coated in acidic slime, taking 1d6 acid damage at the start of each of their turns. The ooze can be wiped off using an action or by being doused with water. Creatures passing through the area take 1d6 acid damage from the ooze on the ground and the ground is treated as difficult terrain.