Sekiro - Corrupted Monk

The True Monk first appears to Sekiro at the entrance of the Wedding Cave Door and is merely an apparition form of her true self. In her left hand she grasps a traditional Buddhist prayer bead, while in her right hand she holds a nagamaki blade. The monk is also wearing a mask of a fierce guardian deity. Defeating the Corrupted Monk and Guardian Ape triggers the next stage of game progression, causing some of the mini-bosses in Ashina Castle to be replaced by different ones as part of the Central Forces's invasion.