Not sure if im just dumb but i cannot for the life of me figure out how to get the second keystone in the room with the gas. i've been stuck on this for longer than i want to admit lo
hookshot it from outside the roomthe toggle door switch puzzle was intended as a prompt for it
people who played sylphy wouldve gotten it quicker since theres a keycard you have to get this way (and a sliding tile puzzle you can skip entirely)