Realms of the Haunting

Hints:
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Early on, you'll find a box of matches. Try them on
everything that looks like it could be lit, especially
candles.

Don't waste ammunition in the room where the soldier
automatons keep appearing. This one has a puzzle solution.
Hit all three handprint buttons on the walls, and a fourth
button will appear in the little side pocket of the room
until you hit that fourth handprint, the automatons will
never stop coming.

Do you trust in time? Yes, you do.