Rank 3 Black Spiral Dancer Gift
One of the greatest Black Spiral Gifts, this wicked magic allows the werewolf to poison a spirit with mystical toxins that slowly corrupt it into a servant of the Wyrm. A variety of Banes teach this Gift.
System: When the Black Spiral Dancer makes a successful claw attack against a spirit, the player may spend one point each of Rage, Willpower, and Gnosis, and roll Intelligence + Occult (difficulty 6). This infects the spirit with a number of ‘corruption points’ equal to the successes rolled; multiple applications of this Gift are cumulative, and corruption points dissipate at a rate of one per day. Should a spirit ever have more corruption points than its current Essence, over the next lunar month it suffers a slow, painful transformation into a Bane.
Source: Book of the Wyrm W20