...because it does nothing since 1.1.2.
Skill description = Mage's Fury +
"Killing an enemy with this ability restores X magicka"
What it really does?
Nothing. It is not restoring magicka for anyone in any situation, ever. Not even once after 1.1.2. NEVER. IT DOES NOTHING, but is a copy of the basic skill.
If it is intentional (because we are being ignored and it is not listed as a known issue or in the fixes for 1.1.3), you should remove it from the game instead of lying, ignoring or pretending.
Anyway, I am tired of this and this is my last post. Unsubbing until it finally is fixed.
(If someone thinks I'm overreacting, think of it this way: Lets take your most used skill/morph, make it do nothing, and then pretend that nothing has happened).