Ultima

You conjure up a massive ball of energy and slam it directly beneath your feat to deal a massive amount of damage. This spell automatically makes the user fall unconscious. Each creature in that area must make a constitution. On a failed save, a creature takes 15d20+50 static damage and is knocked prone and blinded. On a successful save, a creature takes half as much damage and isn’t knocked prone or blinded. The aftermath of the explosion will destroy all surrounding material it hit, including water if targeted at water.