"Succubulon"

"Sucubulon"...it just rolls off the tongue. It must be something good!

Finishing the spell, the symbol on the floor flashes bright red, temporarily blinding you, and you collapse to the floor.

Blinking, your eyesight starts to return. You realize you don't feel cold anymore. As you look up, you see a red-skinned figure facing away from you in the symbol. It is clearly a woman, as it is wearing tight leather pants that show off its curvy ass.

"H-hello?" you say nervously.

The figure whirls around, and your suspicions about her gender are confirmed when you see her massive, perky breasts. She is clad in black leather that covers just enough to be technically clothed, but not enough to be modest. Small, red horns poke up out of her long black hair. She's a demon!

"Who are you?" you ask, standing up.

The busty demon approaches you, giggles, and says "A succubus, silly! A sex demon?"

Blushing, you try and correct your mistake, un-summon her, but she shakes her head and giggles again. "Sorry! Can't leave until your tank is emptied!" She grabs your junk on that last line.

Well, she is pretty hot...