"Fine...". The man said. The demon was silent but then he answered "Firstly, I want you to go outside and kill that other demon". The man was glad to do this, finally he would get his revenge on that monster but also use his new power. "Well lets do this the fun way" the man said. They both laughed sinisterly.
Outside the demon was flexing his muscles hard "This feels so good...right now I need to go into that form...just to balance the feelings". The demon with his huge arms took off the ring, he felt his chest grow three sizes, muscle mass rippling. He groaned in pleasure as two horns sprouted from his head and 2 small wings. He flexed his body and groaned again. "Now that's done...I better get the potion and kill that stupid human".
The demon walked inside now in his compressed state and saw the man standing there with the same vial of the liquid as before. "I see waited like a good little human...". The man decided his plan and went forth with it.