Cosmic Intervention

Call to the beyond, and with your own force of will tear open a hole to the celestials. With their help, nothing may stand in your way, and all shall be turned to ash. All creatures that the caster consider hostile take 6d6 radiant damage, and must succeed on a DC20 intelligence saving throw, or be driven mad by the power of the celestials, causing them to only be able to use any actions on themselves.