Minuo is a spell of Black Occultism. Most commonly cast by 

vengeful Occultists who seek not only power, but a torturous death for their unfortunate victim. 

One need only the name of their target and a patch of a recently worn garment. Once acquired, the scrap of clothing is marked with the target's name in the blood of the Occultist by which the spell is cast. The fabric is then burned to ash and consumed by both the caster and receiver of said spell.

Once cast, the Occultist will steadily gain power as their victim perspires their own blood until they eventually die. This spell is often used to suck the life and power out of a chosen foe without their knowledge, and the common Sorcerer custom of never consuming food prepared by anyone who dabbles in the occult is a sensible method of protection.