Elemental Blast

A blast of elemental force explodes from within you in a 30 ft. radius. Those in that radius must make a Dexterity saving throw. If succeeded, they take half damage, if fsiled, they take full damage. They take 1d8 cold damage, 1d8 fire damage, 1d8 lightning damage, and 1d8 bludgeoning damage. 

If you cast this spell as level 6th or above, for every level above 5th, the damage increases by 1d8 for each kind of damage.