"Come, eat. I will explain afterward."
Vacker doesn't argue, he probably hasn't eaten decent food in years. Between the two of us not even scraps are left when we are done. Once we are both full I quickly explain the deal I made with the demon lords.
Vacker says "Are you insane? They are your enemies!"
"Yes, but getting them to fight the other demon lords will buy me time to prepare for their invasion."
Vacker says "I guess there is some sense in that. So what am I doing here?"
"I asked to borrow you, I need help training and raising my strength. I will be fighting under the suppression of the manacles."
Vacker says "That is a tall order, just moving in the manacles takes a huge effort."
"I can already move a little, I have a week, maybe two, to get strong enough to survive in the arena."