Dantrang's Swarm of Swords

You create an area that extends from you 30ft in every direction. In this sphere there appears to be 5 flying swords. Any creature that enters this area must make a dexterity saving throw or take [roll]5d8[/roll] slashing damage or half as much on a success. You can take an action to move this sphere 5ft in one direction that you can see.

At higher Levels For every Level above 4th the damage increases by 1d8.