"The homunculus of the fetus Teacher had to abort. She tried human transmutation too, which is why she could do alchemy without drawing a physical circle," Al explained. "Somehow or other, the little hyperactive brat was able to replace his homunculus limbs with Brother's arm and leg, and using those, he could do alchemy, because those were still Brother's, and I guess still somehow connected to his spirit, through the Gate and all. If Teacher hadn't stopped me, I would have ripped the damned things off him."