Year Stealing

By means of this spell an evil wu jen can steal years from a victim's life and add them to his own life. This draining of life force demands special preparations. It is an arcane art lost for  hundreds of years. This spell is the truth behind the old wives' tales that wu jen’s could steal a man's life.

Before attempting to steal years, a wu jen must gather blood from his intended victim, which he mixes with his own and water, then places the liquid in a special glass screen made for  this purpose. The glass screen must be at least waist high, formed of two panels with a thin channel between, and a hole bored through the center. An unlit black candle is placed on the  victim's side of the glass pane and a white candle is lit on the wu jen's side (this is reversed to reverse the spell). A unicorn or kirin's horn is stuck through the glass pane in the hole left  for this reason, and this acts as a conduit for the magic. When the wu jen casts the spell, the glass screen glows with the light of the candle and this light builds in intensity until a flash  of white light envelopes all components, including the people. When the light recedes the white candle has blackened and is blown out while the unlit candle is now streaked with gray  and burns with a blue flame. The victim makes a Constitution saving throw. If the save fails, the wu jen becomes 2d6 years younger, while the victim adds the same amount of years to his age. If the save is successful, only 1d6 years are exchanged. The unicorn's horn turns to useless dust.