Armor Core

Armor core is a legendary material which can be earned through the levels 32, 34 and 35 of the Prison of Elders. After obtaining one, you can trade it with Variks for a legendary piece of armor, which changes every week. Additionally, if you have the Weapon Core, you can trade the two together to obtain the Judgement's Chance, where you have a chance of obtaining a piece of Prison of Elder armor or weapon.