Rain of Force

5th-level evocation
* Casting Time: 1 action
* Range: 120 feet
* Components: V, S
* Duration: Concentration up to 10 minutes
Upon casting this spell, the caster sends up a multitude of large force bolts which fall and strike targets as he chooses. When cast, you may target a point that you can see. The bolts of force strike all targets of your choice at that point and up to 5 feet from that point (creates a 15 foot cube) or strike up to 2 targets you can see with full effect. These targets take 6d6+10 points of force damage. In following turns you may opt to use your action to use this effect again with the same or different targets. 
At Higher Levels, this spell deals 1d6+1 extra damage.