Arcane armegeddon

   You clasp your hands in an almost "V" shape as four magical nuclear bombs drop in 4 points of your choice. each creature in a 2500 mile radius of the blast must make a Dex saving throw or Die instantly regardless of resistances. If a creature makes It they take 1d100+30+800 bludgeoning, and 1d100+30+800 fire regardless of immunities or resistances. The blast spreads around corners. If the caster of this spell is caught in the blast he is immune to all effects and the caster and his companions don't take any damage.