Chicken Bones' Visor

Treasure bags are the only source, which puts this behind Expert or Master. A Classic world will never produce it. Every Hardmode boss bag can roll it except Queen Slime's, and since the chance does not change with the difficulty of the boss, repeating a fight you can finish in a minute beats saving it for the late ones.

This roll is better than most vanity drops because Chicken Bones' Wings come with the clothes rather than instead of them. They are a working accessory, not a social slot piece, so even a player who never dresses up has a reason to want the drop.

The visor, vest, robe and pants are appearance only. The outfit is the developer set for Chicken Bones, a programmer at Re-Logic who also works on tModLoader. It is the most recent of the developer sets, so characters carried forward from older saves tend not to have seen it yet.