The Cinder Dominion / Chamber 91
The Cinder Reliquary.
The chest holds heat from a room that no longer stands.
Route notes
The last heat
Directions assume the camera’s starting angle. The compass in the upper-right corner tracks both turns.
Play Aetherfold IIRelease the clasp
Follow the flags and press F beside the first clasp.
Find the other chest
Hold Z to W −3 and walk ahead to the hidden reliquary.
Answer the last heat
Continue up the path, turn right, and press . and F. Reset before going to the gate.