Many exits, only one door unlocked

They all look the same, the many doors that stare back, the wooden handles polished, some rotting, each having a keyhole that would need something, not always a key, for the malleable, the fluid, the skeleton can always conjure up the right substance, each door slowly fades out as the clock ticks, the things you can use too begin to dwindle, hot, hot, fire begins to burn and it is too hot to breathe.