Eridor's Arcane Blade

You manifest a spectral copy of your weapon to harass your enemies. It hovers around you to a distance of 5 feet for the duration.

When a creature enters the area for the first time on a turn or starts it's turn there, you may make a spell attack roll against it. On a hit, deal 1d10 Force Damage. If you make an attack this way, you may not do so with that weapon again until the beginning of your next turn.

The spell creates more weapons when you reach higher levels: two weapons at 5th level, three weapons at 11th level, four weapons at 17th level. You can direct the weapons at the same target or at different ones. Make separate attack roll's for each weapon.