Press the Attack - Rune.
I recommend a nerf for this rune because at lvl 1 you get first blood with it so easly, just get a duo bot with lots of CC and that rune, that makes you vulnerable for 6 seconds, makes you to die so easly. I would like that rune to be nerfed and the seconds be less...around 3-2, because is too much 6 seconds of vulnerability.