Perfect Metis

From the White Wolf Wiki, the most complete White Wolf reference

The Perfect Metis is a Garou born from two Metis that has no deformities. Its birth was the sign of the Apocalypse. It was born July 4, 1999. It was fortold in such ancient tales as the Death Song of the Croatan, and also in the Vision of Eeyarlagh Twice-Born and in the Dreams of Guliera Moonsister. They seem to be uniform in their uncertainty as to the nature of the Perfect Metis, whether it would be a savior for the forces of Gaia, or a doombringer, carrying the banner of the Wyrm.

It appears in the book Apocalypse, the last supplement for the Werewolf: The Apocalypse roleplaying game. In different scenarios, it is sacrificed to the Wyrm, or is possessed by the Wyrm and emerges as a full grown and mighty warrior, and is something of a hero in the story, representing the voice of the true Balance Wyrm and aids the Gaian Garou against the Weaver.