Nathan laughed as he stroked Mitch's rubber body, exploring it. His fingers lingered on Mitch's buttocks, tail and his rubberized opening beneath his tail.
Nathan was immensely enjoying the sight of Mitch, completely helpless as an inflatable donkey. Now he could have some fun with him, get his revenge. He pulled out the lump of amulet and walked in front of Mitch. "I wish to be a very large male draft horse," Nathan says a dark gleam in his eyes. Mitch could only look with his painted eyes at Nathan and feel terror begin to creep into him.
The amulet granted Nathan's wish and he began to transform. Nathan was not wearing any clothes, so the changes were easy to see from the first. Dark brown, nearly black, fur sprouted everywhere, lightening from his under neck to his crotch. Nathan's face elongated, his nostrils flared and swelled. He breathed heavily as the transformation continued. Enjoying becoming equine again. Ears lengthened and soon were moving as they heard new sounds.
Nathan's hair grew into a silky black mane down his neck. To match, a long tail sprouted out behind him, also growing silking hair. Legs and arms changed next as Nathan was forced to the floor, unable to stand upright anymore. His four new legs could now only bend in one direction. Awkwardly, Nathan stands up onto his new hooves.
Now mostly changed into a draft horse, Nathan whinnies happily. But, the changes aren't done. Nathan starts swelling and gaining mass. He quickly becomes two and a half times the size of Mitch the donkey. Nathan's body fills out with fat and muscle and then the changes are finished.
Nathan was now a massive draft horse, the floor strained under his weight. He clops over to Mitch, who would be quivering if he wasn't an inflatable toy, and sniffs him.