A cache of Skaven warpstone tokens as depicted in Total War: Warhammer II.
Warpstone tokens are pieces of refined warpstone that are consumed by power-hungry Skaven Grey Seers or the Warlock-Engineers of Clan Skryre to aid their spellcasting in the Lore of Warp.[1a]
This is dangerous as overconsumption of warpstone can lead to mutation and death, even for the ratmen, but the quick road to power is an irresistible draw for almost any Skaven.[1a]
Warpstone tokens are also used as the chief form of currency within the Skaven Under-Empire.[2a]