http://www.wyrmfoe.com/317/mercy/
Rank 1 Children of Gaia Gift

Children of Gaia see no use for lethal force when they are not fighting minions of the Wyrm, but even they succumb to frenzy. This Gift, used chiefly by Children of Gaia with high Rage or in duels, allows the Garou to use her natural weaponry and Rage without fear of killing her opponent. A dove-spirit teaches this Gift.

System: The player spends on Gnosis point. For the rest of the scene, all damage that the Garou inflicts with her own body (claws and teeth, but no weapons of any kind) is considered bashing. A creature “killed” by such damage merely falls unconscious, and he may heal the wounds at the usual rate for bashing damage.

Source: Core book revised.

Step 1: Decide what your fetish will do

A steel sword fashioned in klaive style that will do bashing damage when activated. Level 1 gift Mercy.
Fetish level 1, gnosis 4

Step 2: optional modifiers to rite of the fetish difficulty
Rite of Cleansing (-1 per success over the fetish's level)

+roll/job #=Charisma+Rituals vs 6


Step 3: Decide what type of spirit to summon
Dove, Axis Mundi: The Book of Spirits. Rage 2, Gnosis 9, Willpower 10, Power 70.

Step 4: Perform Rite of Summoning
Pierce or enter the Gauntlet (generally handwaved)
Summon a spirit (generally handwaved that you spend a couple hours working on it; roll your Gnosis, difficulty = 3)
If you get less than 3 successes, the spirit is initially hostile (+1 difficulty to Rite of the Fetish)

+roll/job #=Gnosis vs 3

Step 5: More optional modifiers to Rite of the Fetish difficulty
Clever Persuasion
Spend willpower?
+roll/job #=Charisma+Leadership vs 10

Step 6: Perform Rite of the Fetish
+roll/job #=wits+rituals vs ?