The Cats Blast

A blast of pure energy leaps your hand as what appears to be a sparkling cat of pure energy shoots out. Make a ranged spell attack against the target creature. On a hit the cat blasts through them and they take 5d4 energy damage. On your next 3 turns you can have the cat target another creature as a bonus action. For your next two turns you make a ranged spell attack against the target and on a hit they take 1d10 damage. On the third turn you can make a ranged spell attack and on a hit the cat bursts into energy and all creatures in a 8x8x8 foot cube including the target take 1d8 energy damage.

at higher levels: at each next level, each amount of dice is doubled and the amount of targets you can hit before the cat explodes is increased by one.