User blog comment:ErdamonPL/Sinitar - the Anti-Mage/@comment-7709681-20130921231358/@comment-11434673-20130922013618

The idea is nice, but the problem arises with Rage, Fury, Heat, Ferocity, Energy, and Resourceless. Each provides a different way for the champion to use their abilities and each has little to no connection to one another. To give a champion the ability to effect each one differently (for one ability) would make little sense. How would burning mana translate into burning energy or Rage/Fury, or even dealing direct health damage? Here lies the problem...

Back when Wit's End had feedback, it was the only item that singly had an additional effect against mana champions. The same problem would be here. Mana champions already have a problem with having to build mana to stay out longer, but now they have a champion that directly counters them.