Clear A Space

You stomp your foot into the ground and force ripples out from you tearing apart the ground. Creatures within 30ft of you take 6d6 Force damage and most make a STR save or be knocked prone. 

The ground in the area of effect is now difficult terrain. 

Higher levels: At higher levels the effect is extended 5ft, and the damage increases by 1d6 for every spell level above 5th.