bad spell dont use

You touch a pebble and imbue it with magic. You or someone else can make a ranged spell attack as a bonus action with that pebble by throwing it. When thrown, it has a range of 20 feet. If someone else attacks with the pebble, that attacker adds your spellcasting ability modifier, not the attacker’s, to the attack roll. On a hit, the target takes force damage equal to 1d6 + your spellcasting ability modifier. Hit or miss, the spell then ends on the stone.

You can imbue more pebbles at higher levels. Total of two stones at 3th level, three at 5th level, four at 11th level, and five at 17th level. 

If you cast this spell again, the spell ends early on any pebbles still affected by it.

"Anyone can cast stones at the Bard, but no one expects the Bard to cast stones at you!"