Blueberrify

A blueberry shoots from your hand, flying into the mouth of a creature you can see within range to attempt to inflate it with blueberry juice. The target must make a Constitution saving throw. On a successful save, the target takes 2d8 bludgeoning damage, and the spell ends. On a failed save, the target takes 4d8 bludgeoning damage, and until the spell ends, you can use your action on each of your turns to automatically deal 4d8 bludgeoning damage to the target. The spell ends if you use your action to do anything else, if the target is ever outside the spell's range, or if the target has total cover from you. Whenever the spell deals damage to a target, the target inflates with a number of pounds of blueberry juice equal to the damage dealt, and the target must make another Constitution saving throw. After failing three Constitution saving throws against this spell, including the initial save, the target inflates with enough juice to push the target to immobility and occupies the space of a creature one size larger than normal, though the target can be rolled easily. The inflation ends after 1 hour.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 5th.