With this magic a Black Order Mage may lend Fatigue to a comrade. Strength Lending is cast first to establish a link to the other Mage, which lasts until one or more points of fatigue are drawn. The linked Mage may choose to draw fatigue from the link when he casts a spell or otherwise deliberately loses fatigue (such as for exertion), and the link will remain in force until they do. As soon as fatigue is first drawn through the link the spell ends, and the casting Mage may choose to end the link before-hand if they wish, however they have no control over how much fatigue is drawn before that point.
powerAt +4 you can control the fatigue lent