Originally Posted by
Tabartank
You are right about the jungle creeps having no MR, never noticed it. But from the little testing I did, having Mpen increased the damage they took. With 0 Magic pen, my lvl 1 W did 17dmg per second on non frosted target, vs 18 with the Magic pen reds. Doesn't increase jungle speed as much as Atk speed, but combined with
Q and E, It seems like it would be noticable since they take increased dmg in % for being technically at -9 MR.
Edit: And it increases damage against other champs early game, so why the hell not lol.