It can be used to make a series of demon-killing dishes.

According to the query of Knight Download, the function of the Dark Block in "The Legend of Zelda: Kingdom of Tears" is that it can be used to make the Demon Slayer series of dishes. The demon-killing series of dishes can provide players with additional blue blood bars, which are not involved in the calculation of the blood bar. Each blue blood can resist poison gas equal to approximately 4 normal blood.

"The Legend of Zelda: Kingdom Tears" is an action-adventure game developed by Nintendo Planning and Production Headquarters. It is the 20th game in the "Legend of Zelda" main series and "The Legend of Zelda: Breath of the Wild" "The orthodox sequel to "The Game" was announced in the live webcast "Nintendo Direct: E3 2019" on June 12, 2019, and will be released on Nintendo Switch on May 12, 2023.