Every Gift associated with Fenris in the Wyrmfoe Werewolf: The Apocalypse database.
A specialized power developed by the Swords of Heimdall, this Gift marks the target with a mystical brand that only this Gift's users can see. The Swords use this brand to label their enemies so that all other Swords can see the threat. An avatar of Fenris himself teaches his children to identify their enemies thus.
The Garou's already vicious bite increases in power terribly, to the point that the Garou can mangle or even sever limbs with a single bite. An avatar of Fenris teaches this Gift.
The Garou who uses this Gift must be in good standing with his tribe's totem, and he must have a great need for aid, for he is asking help of Fenris himself. This Gift -- taught by an avatar of Fenris -- summons great wolves to come to the Garou's aid.
No true Get of Fenris fears death - only dying poorly. This Gift is Great Fenris' final blessing to his children; the Fenrir who activates this Gfit intends to die with her foes' heartsblood on her claws. The werewolf calls on Great Fenris to aid her and sets herself against her foe. The Fenrir continues fighting long after she should be dead, and doesn't fall until her enemy (or enemies) dies with her. The avatar of Great Fenris himself teaches this Gift.