Ari's Elemental Spark

You send an elemental spark towards a target that jumps to other enemies in the area. Make a ranged spell attack against a creature in range. On a hit, the target takes 1d6 damage. Each time the spell is cast select between acid, fire, cold, lightning, poison or thunder damage. You may then make another attack roll at -2 against another creature within 10' of the previous target. You may continuing this with a cumulative -2 to hit per target until the attack misses a target.

The damage increases when you reach 5th level (2d6), 11th level (3d6) and 17th level (4d6). The damage type is chosen when the spell is cast and each target takes the same damage type.