Corkian Insulators are Mythic Corkian Augments introduced in the 2.0.4 Lootrun Expansion update. They can very rarely be obtained from the Reward Chest after completing a Lootrun. Insulators may not necessarily be available from any given Lootrun's Reward Chest during a given week, but the possible rewards are reset weekly. A Corkian Insulator can be applied while rerolling the Identifications of an item at an Item Identifier in order to prevent a chosen ID from being rerolled. Only one chosen ID can be preserved per reroll, and the Insulator will be consumed upon use. Insulators can be used alongside Corkian Amplifiers, but are incompatible with Corkian Simulators (an Insulator or a Simulator can be used when rerolling an item, but not both at once).