Boooom Bots!

You activate up to 3 small, self-propelled explosive Boom Bots. You or someone else can make a ranged spell attack with one of the Boom Bots by winding-up its clockwork engine, placing them on the floor and aiming them at the target. The Boom Bots have a range of 60 feet before they de-activate. If someone else uses one, that attacker adds your spellcasting ability modifier, not the attacker’s, to the attack roll. On a hit, the Bot explodes and the target takes bludgeoning damage equal to 1d6 + your spellcasting ability modifier. Hit or miss, e Bots then de-activates.

You may re-supply your stock of Bots If you cast this spell again, but the spell ends early on any Bots still affected by it

The spells damage increase by 1d6 when reach 3rd level (2d6), 5th Level (3d6) 8th level (4d6) and 11th level (5d6)