The Black cavalier is a piece of members-only headwear. There are no requirements for wearing this cavalier, and they do not confer combat bonuses upon the player. To obtain a cavalier, a player can either trade with another player or receive one as a Level 3 Treasure Trail reward. The black cavalier can be stored in a treasure chest, which can be built in the costume room of a player-owned house.
The Black cavalier can also be combined with a Highwayman mask by Patchy on Mos Le'Harmless island to make a Cavalier and mask. The Black cavalier is immensely more expensive compared to the other cavaliers as its price is about tenfold the price of a dark cavalier.