Although a Garou can give up her tribal affiliation with the Rite of Renunciation (see below), the Black Furies have their own ritual to welcome a female Garou from another tribe into their own. The prospective Black Fury must fast for 24 hours to purify her body; afterward, she enters a ritual circle while her tribemates-to-be quietly invoke Pegasus from outside the same circle.
The invocation takes a few hours (the Mistress of the Rite should roll Charisma + Occult with a target of the local Gauntlet; the invocation takes 5 hours, minus one for every success after the first, with a minimum of 1 hour). At the end of this period, an avatar of Pegasus arrives. The prospective Fury must prove her worth to the avatar. This may involve a test, at the Storyteller's discretion, or it may simply involve a roll of Charisma + Etiquette (difficulty 7). A failure on this roll means that the Fury-to-be must complete a spirit quest to join the tribe; a botch means that she has somehow offended Pegasus and is not welcome to join. Should the character succeed, however, she is welcomed into the Black Fury tribe, and will be treated as a child of Pegasus from that point forward.