Hard to "get free" if you aren't even locked.Maybe that was the plan all along! Inescapable prison! You can't escape if you aren't there against your will and all it takes is to just walk through the door.
Thanks for the New Great Chapter 🤩 Author-san... maybe give Grindelwald one of Morgul rings... to make him loyal to the MC... or just toss him a Failed One Ring (the Bomb)