Does Anyone Know Of Or Have A Collection Of "signs" For The Underworld? Options

I use the term "underworld" loosely.

For some reason, certain insignias, logos or signs are everpresent in my daily life. Every single one of them, as it turns out, represents the underworld or in some way. From the Valknut to the Mitsudomoe.. I was just wondering if anyone knew of any collections of such insignias, so I can peruse them and see if I recognise any others.

Thank you (IMG:style_emoticons/default/smile.gif)

Well, when i used to work with death deities i used these symbols. i dont know if it will help but will share anyway.

I noticed lots of poppies and lilies popping up at random times.

Also ravens, owls, dogs,and bats.

Certain herbs like aconite, nightshade, henbane.

Bark from willow trees.

Colors black, purple, red.

Thats a general idea it may not have been helpful but i tried.

Dark Blessings,
Hexy