Eldritch Wave

When the Eldritch wave is cast, a literal formation of a wave fires out in a 500.ft cone, this wave can be used to destroy walls an buildings if on a natural 20, all opponents in range must make a Constitution saving throw (DC 18), on a successful save the opponents takes Half Damage and is not knocked back and cannot be knocked back for another hour, on a fail save, each creature within range takes 10d12 Force Damage and are knocked back 50.ft, and are considered knocked prone.

"Like a Tsunami... where the waves are as destructive as fireballs... the Eldritch Wave reaps the very life from the ground " -  Crastar, Aspiring Mage