Carian Phalanx

You form an arc of ten magic glintblades overhead. Whenever a hostile creature ends its turn within 15 feet of you, it is struck by a glintblade. Make a ranged spell attack against the creature. On a hit, the target takes 1d6 + your spellcasting modifier force damage.
The glintblades last for the duration or until all ten of them are used.
At Higher Levels.
When you cast this spell using a spell slot of 7th level or higher, the damage increases by 1d6.