Let’s keep the 7th level DnD spells rolling with a Wizard spell!
Caustic Bomb
7th-level conjuration
Casting Time 1 action
Range: 150 feet
Components: V, S
Duration: Instantaneous
With a deafening plop a ball of acid explods in range coating everything in 30 feet in acid. All envviroments are covered dealing 12d6 acid damage to the ground,wallss,andd unattended objects. Creatures may attempt a Dexterity saving throw for half damage and to not be covered. If a creature is covered in acid, it will take additional damage at the start of each of it turns. Each turns after being covered, it takes damage equal to half the damage it took from the spell last turn. Each time it takes damage it may attempt another Dexterity saving throw to end the effect after taking damage. this effect continues until the amount of damage equals zero. In addition, an affected creature may scrap the acid of as an action to end the effect.
Thoughts?
Throat Punch Games 