Most interesting chapter for me in a while. Alphonse's plan was just great, and I wonder what the long term effects on Pride's body will be, since he mentioned the need for food, water and air.
One of the biggest obstacles on immortal characters in fiction is absolute and continuous damage(like the foundry on Terminator 2), will he spend all his lives immediately due to those biological needs, since he could technically be dieing multiple times on a small time frame? Also, couldn't Al try to smash his powerless child body to pieces with physical strength or with alchemy? (I'm assuming he can use alchemy inside that thing)