Warpstone is a central material in Warhammer Fantasy lore, described as solidified raw magic that glows green and corrupts anything that handles it. The rat-like Skaven mine it, eat it and build weapons from it, so caches of it signal both wealth and danger in games such as the Warhammer adaptations. Online, this cache cue has become shorthand among fantasy and gaming creators for finding something powerful but tainted. Its mix of magical crackle and Skaven chitter keeps it tied to loot, mutation and reckless greed.