"I... You... What do I... What even can you... Ugh." The situation became a little more than a little overwhelming really fast and you didn't know how to even word the questions racing into your head at breakneck speed... Head resting in your hands for a momentary reprieve you let out a sigh and called out to the ... boys?... you left upstairs making out... "Could you please come down here?"
The group quickly obeyed sounding like a thundering herd on the stairs. Soon the kitchen was filled with 11 teenagers, only one of which was clothed. You quickly realized you would prefer them stay in the privacy of your bedroom but there wasn't enough room. "So, first things first. You said I have to sustain you. how do I feed you my magical energy so you don't... What? Break? Crumble? Turn into a pile of supplies? Do I even have magical energy to sustain you?" The questions were beginning to race through your head again. What if you could become a wizard? What if feeding them hurts? How long do they go without eating? Should you maybe turn half of them back into statues to conserve energy?
One of them spoke. "We have never seen one of our own starve to the point of ending. Your grandfather kept us fed by letting us feed as he was near us. You do create enough magical energy to sustain us but, from our current state, and your lack of using magic, you cannot yet fill us."
"As he was near you? You mean its not a physical thing? Just, like, a psychic thing?"
"Correct, mostly. Not psychic, but magical, though we understand you don't have experience to understand the difference."
"All I have to do is tell you to feed? Does it hurt me?"
"Your Grandfather showed no signs of distress during feeding. Though he was more capable than you, magically."
"Okay, take some magic from me and stop after 5 seconds or stop immediately if I express I'm in pain."
You felt a light tingle mentally but nothing significant. "Okay, the rest of you do the same thing..." You felt a strong tingle, a weakening in your concentration, but no pain. "Wow guy's that was an interesting rush. Do you all feel better? Did that do much for you?"
"We don't feel pain as our magic depletes, and no that didn't do much for us. We were all fully charged, reduced to figurines, restored, and active for the last half hour. We went from roughly 40% of our magic capacity being filled, to 43%."
"Oh, then I guess, everyone keep eating. Let me know when I'm empty." A wave of growing disorientation washed over you, though still not painful. You wanted to concentrate on the time that elapsed but the thought became so slippery and got away from you as the group ate.
"You are out of mana for now, we are about at 50% of our capacity."
Right now those words didn't mean anything... you had more questions, but they were just not coming to you. "Could you guy's get some clothes on? I'm tired of looking at you being all naked and stuff."
"Yes, what do you want us to wear?"
You knew there was a reason they were naked in your house, and it was a good reason, but it was just so hard to think right now. You wanted to protect them for some reason. "I don't know, if you need clothes, take some of mine." You got up and collapsed on the couch, not feeling tired, just out of it, like you had a cold and took medicine, things just weren't clicking into place for you.
You awoke to a room full of teenagers staring at you. You didn't look at the clock before falling asleep and things felt hazy for you but nothing like before you went to sleep. "I guess I can't say you aren't what you say you are. So, you all are mine now? I have taken ownership of you and you will be mine until... what? I die?"
"You die, or we do." a voice said from the crowd.
"Huh. I get that you can help with chores, you can change ages or transform into figurines, I saw something about exchanging souls, I'm guessing that's me taking one of your bodies over. What else can you do?"
"We can subsume you."
"What does that mean?"
"If you want to look more like one of us without switching souls, we can surround your body and transform our exterior. Your grandfather used me to take the appearance and voice of a thirty year old redheaded bodybuilder. And when he was done I separated."
Until now you had wondered why your grandfather surrounded himself with only male slaves since he could surely make either gender equally strong but him being able to go out looking and feeling like a strong 30 something and not have to move his soul around to do it made a lot more sense.