Ultima

When casted you begin to glow with a divine blue light signaling the end as a flood of blue arcane energy scatters the battlefield. While this spell is active you cannot move. all creatures within a 100ft radius of you are aware of your presence, the area within 100ft of you is considered difficult terrain. Once the round has ended a sphere of expanding divine energy shoots out in a 100ft sphere area. All creatures within the area must make a WIS saving throw equal to your spell save DC. On a fail all creatures take 15d20 Radiant damage. Resistance & Immunity to radiant do not half or negate the damage of this spell. on a pass creatures take half as much damage and the effects of resistance & Immunity are not negated.