Sly is a Merchant in Hollow Knight. He sells many wares at his shop in Dirtmouth for Geo, but drives a hard bargain. Sly also appears as a boss as the Godmaster Great Nailsage Sly. During his previous occupation, he trained some disciples in the Nail Arts: Oro, Mato, and Sheo. He first appears in an abandoned house in the southeast region of the Forgotten Crossroads. Hollow Knight cursor pack with fanart Sly game cursor.