User blog comment:DamonDraven/Oh, dear Reaver.../@comment-24795478-20141213081425

Too good on caster though :P. Let's suppose graves with this item, brutalizer ( for youmuu) and rune+mastery for ~130 bonus AD, so Q will deal atleast 350 damage to minions * 5minion each wave * 6% = 105 mana restore > 100 mana spent for Q. The moment Graves finish this item ( 10-15 mins ) is the moment the other team cry in agony defending the pushing power.

The same apply to Lucy, Ezreal and Varus.