Cosmetics Only Obsidian ArchPaladin, Blinding Edge of Obsidian + more.
Complete the storyline at /mysteriousdungeon and /cursedshop. If you're stuck in the first room of /mysteriousdungeon, click on the cake, the loose brick on the wall, the pencil inside, the rock next to the bucket, and then the cell door.
Member + Non-Mem
Complete the Cursed Bust's "Lamps, Painting and Chairs, oh my!" quest at /cursedshop by defeating the Antique Chair. To access this, walk right>up from the starting screen and click on the Quests button at the top-right.