Corvus' Orange Clout

You lob an orange ball of viscous jiggly juicy acid at a point within range. It explodes. Each creature in a 20ft radius must make a dexterity saving throw or take 6d4 acid damage and another 2d4 acid damage at the end of its next turn. On a successful save, a creature takes half the initial damage and no damage at the end of its next turn.

Constructs made have disadvantage on this save. 

Constructs and nonmagical objects not being worn or carried take an extra 2d4 damage. 

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the initial damage increases by 2d4 for each slot level above 4th. The additional damage increases by an extra 1d4 acid damage.