Technology. Playable at a tapped or untapped Shadow-hold [S], Dark-hold [D], or a site with a Dwarf-automatic-attack. Discard during the site phase at a Border-hold [B] or Shadow-hold [S] to make all versions of the site Ruins & Lairs [R]. Its normal automatic-attacks are replaced with: Gas-each character faces 1 strike with 7 prowess (cannot be canceled). Keep Vile Fumes with the site until the site is discarded or returned to its location deck.