CUMblamo

A bright streak flashes from you to a creature you choose within range a low rumble is heard origination from the chosen creatures loins . The chosen creature makes a constitution saving throws , taking 8d6 Fire damage on a failed save or half as much damage on a successful one. The chosen creature must use an action to get itself under control. The creature begins to well for lack of a better word spurt obscene amounts of cum in a concussive blast any creature in a 20ft sphere around the creature take 8d6 Fire damage as well. Creatures moving through this area have their movement halved for there first turn but can move normally after that. 

The cum can move around corners Flammable objects in the area that aren’t being worn or carried start burning.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 3.