Crumble Undead

You send a spiraling blast of radiant energy from your fingertips shaped like a group of three circles to crumble the bounds of an undead. Make a ranged spell attack against the target. If it hits it deals 1d8+1d6+1d4 radiant damage, other-wise the target takes no damage if it's not undead. If the dice all roll the same number of damage, the spell jumps to every undead within a 5 ft. radius of the creature, the effect then ends.
For each spell-slot cast above the 1st, increase the damage this spell deals by +4. If the the spell is cast in the 5th slot or higher, the possible times the spell can jump is now 3.