You may select any existing breathing style or make your own, you start at the level of post Demon Mountain Tanjiro with whichever style you pick, you gain a powerful sense equal to Tanjiro's sense of smell or Zenitsu's hearing. You can select multiple styles, though keep in mind that unless boosted physically by other powers stronger breathing styles such as Stone, Moon, Sun etc. will be more stamina intensive. You can eventually train to be at the level of a Hashira with extreme diligence and effort for extended periods. It also comes with a Sunburst Steel weapon of your choosing. This blade works with upgrades that effect Objects of Power.