Probably one of these: the cloak from that one week long Queen's Wrath event, Arctic Proxy Shader, Frost Fire Shader, Cloak of Perception, AOS#Cryptid Cloak, and some of the vanilla legendaries I have kept until now. Now if only one of these Dead Orbit shaders would drop for me. These are the vanilla weapons I still have as well: Super Pox VLO The Aries Nemesis X4 The Swarm The Cure The Crash Doctor Nope 77 Wizard