The Poison Gas Trap emits a cloud of toxic gas which drains the health of anything near it. The Gas Trap can be used five times before it needs replacing. You won’t have to put down another trap; your Imps automatically go to the Workshop, take a Gas Trap and restore the old one to full. Remember that the poisoned gas can hurt your own creatures if they inhale it. To manufacture the Poison Gas Trap, your Workshop must be made up of at least ten squares. Bile Demons, undead creatures and Wizards are immune to poison gas.