Blooming Blows

You hurl a stream of dream dust toward a creature within range. Make a ranged spell attack against the target. On a hit, it takes 4d6 Radiant damage, and the next attack roll made against it before the end of your next turn Converts damage into sleep counters. Also move all counters within this spells range to target creature on hit.

Using a Higher-Level Spell Slot. The damage increases by 1d6 add next attack converted to sleep tokens for each spell slot level above 1.