This is another relic of the Black Sun Project era. Though the colors aren’t appropriate, I called this the Red Hand/Black Hand method. It keyed powers to each finger of the right and left hand, the positive finger of onehand pairing with a method of harm on the oppositional finger.

•  Thumb: Inspiration, Suicide.
• Forefinger: Wisdom, Contagion.
• Middle: Prowess, Violence.
• Ringfinger: Fitness, Wasting.
• Pinkie: Skill, Accident.

At least as far as I can reconstruct.