Netherwind Regalia sets, drinking Pabst Blue Ribbon and listening to Bon Iver. (Full disclosure: I went to high school with the dude from Bon Iver and he was actually pretty cool, but I will still make fun of his ridiculous beard. Sorry, Justin.)
Submitter Zorax of Area 52 (US-H) wonders how many Blackwing Lair runs it took for everyone to get their full sets, but really, it's just a common effect of a potion you can find in the Underbelly. So folks, go ahead and drink any psychedelic drinks you find sitting around in sewers. What's the worst thing that can happen?