User blog comment:Kungfugi/Rosy, the Innocent Exterminator/@comment-1445357-20120130042546/@comment-4800808-20120130050025

I've changed the mana cost a bit, also leveling up that skill makes it so you can travel further from an allied champion. I also wanted it kinda high cost so you can't be invisible for long periods. I think the passive works pretty well with her kit, since when she attacks while invis she auto crits. But like you said it isn't always going to work at the best time so imo it doesn't become to strong