User blog comment:Hamengeri/Fin, the Silent Assailant/@comment-18521310-20130925110924/@comment-10256611-20130925114932

Thanks, critical strikes reduce remaining cooldown of Edge of Silence.

Manaburn is very powerfull, true. But it's also quite easy to counter in laning phase, by mana regeneration or blue buff( would be a perfect counter). Additionally, each strike has mana cost and Fin's mana pool is quite low. With no mana items, a full combo and a couple of autos would spend all his mana. What's more: Both Energy Stealer and Manaburn encourage Fin to come closer, so good poke would make him go out of mana quickly [he would have to choose between spending all his mana on farming (Q, jumping to minions, autoattacking and jumping back) or trying to burst you down]. I'll add "countering and tips" section soon, btw :)