Okay, 2 layers I can believe. How the hell did you skip straight to 5 or 6 layers!? I mean it helps that these things are durable as hell, but you're really just stacking one mechanic regardless of difficulty. Truly autism-coded.
Wonder if the sister passed before or after the shift(or by the conversion).
Obviously he’s gonna be stuck in a closer relationship eventually for his own safety. Also that meteorite he carved is probably why the mutations around him slowed, he cut out the fuel.
Fun enough start
A little ominous that he just left the staff out. Wasn't there already a thief around in the first chapter...? With human footprints and everything, so...