User blog comment:Willbachbakal/(Item Concept) Spell-Based Sustain/@comment-973379-20141107050333

Brand's passive count as single target DOT that apply spell effects(even if he apply it to vany targets in one spell). So after good ult in teamfight WotA will proc for him 3-5 times each 0.5 sec. Slightly too much, I think.

Also wrong. Single target DoT(like Swain E or Morde R etc) benefit from full spell wamp, not 33% of it.