Acid bubble

You create a 5 foot radius half sphere bubble made out of acid. The area inside of the bubble is unaffected by area of effect effects whose point of orgin is outside of the bubble. The bubble explodes if it takes damage or is touched. When it explodes it stops any projectile magical or physical that touched it. When the bubble explodes it splashes all creatures within 5 feet of the bubble exept creatures inside of the bubble. The splashed creatures make a con save. Upon a failed save they take 3d6 acid damage and are blinded until the end of the turn, only half damage on a succes. If a creature walks into the bubble they take double damage and have disadvantage on the saving throw. A creature can touch the bubble with a object as a bonus action. If you cast this spell while you already have a bubble created from it that bubble explodes.

At higher levels the radius of the bubble is increased at 5 feet per level and the damage on a failed save is increased by 1d6 per level.