Underworld trail equipment

Anonymous writing prompt.

Underworld trail equipment:
1. A horrible-looking bird mask, between witch doctor and plague doctor's, beak filled with blessed herbs to filter the poisonous gas that fills some of the tunnels.
2. Spiked boots, to keep your footing in the frozen passages, fitted with distinctive treads unique to you, so that you may leave tracks and find your way back
3. An iris flower, known among scholars as the "underworld's compass". It will help you find the right way, avoiding illusions and traitorous paths. It'll last for a few days until it withers. After that, you're on your own.
4. Memories of home. Absolutely necessary to muster enough willpower to make the trip back. Can take the form of delicious food (but see below), a letter from a loved one, or just a depiction of something you love on the surface.
5. Underworld rations. Does not contain the flesh or bone of once-living beings. You really don't want to bring the flesh or bones of once-living beings down there. Trust me on this one.
6. Stone tablets and chisels. The waters down there will try to erase your mind and ruin your scrolls when you cross them, so keep your knowledge on something they cannot touch.