Our deep study into Hellerium metabolism has allowed us to unlock the secret of Crys-Gas, a chemical compound declared odious by the Factions, which overcharges said metabolism and can lead to spontaneous combustion. While this kind of weapon is extremely dangerous to Ubers and other mutants like us, and should be handled with care, it is even more deadly to Zombies and especially Chryssalids, as the name implies. We will need a Refinery to manufacture these weapons.