u/foe_hammer_time

Can anyone confirm what the medallion around the Bone Giant's neck is supposed to be? It looks awfully like a mouse's head to me, but I have no idea why. It seems comically out of place with other TK paraphernalia, except perhaps, I believe there is some lore about a random Skaven appearing with a dagger or something, centuries before they appeared in the old world Can anyone shed any light, or correct my misinterpretation of what it is supposed to represent?