Call of Thunder

You call forth thunder clouds around your location in a 30 ft radius.  Lightning strikes all non-allies/party members in the area dealing 1d12 lightning damage to them.  On a failed WIS/Survival check the creature is rendered unconscious. 

At Higher Levels: 60 ft spell radius at LVL 8, 2d12 lightning damage at LVL 12, 120 ft spell radius at LVL 15, 2d12+5 lightning damage at LVL 20