The Demon Dweller title in Sailor Piece, introduced in the April 26, 2026 Anti-Magic update, is a high-rarity item that provides players with a 100% damage buff. To obtain this title, players must first unlock Sea 2 by reaching level 12,500 and achieving Ascension V. They then need to collect Crystal Keys from defeating NPCs on Sea 2 islands. Once equipped, the title can be acquired by defeating bosses during the Crystal Defense game mode. Players must protect a crystal from waves of enemies, with bosses appearing every five waves, offering a chance to drop the Demon Dweller title. The drop rate increases with higher wave levels, but it is not guaranteed, requiring players to potentially complete multiple runs to obtain it.