Liquid oxygen

Liquid oxygen (sometimes mistaken for Summoning potion) is an item used with Charcoal to produce Cryo-charcoal, which can be used as a ranged weapon. Liquid oxygen can be obtained by bringing an empty vial and two ice coolers to the Chemist. Obtaining Liquid oxygen is long and discourages most players wishing to make use of Cryo-charcoal, mostly for PvP.