League Logics #3: Walls
Allows a couple of dudes 
to dash through.
Allows a bird to swoop over as well 
But bounces off a 500 ton Juggernaut when coming to it at high speed 
3 Comments
So, nerd post inc: this actually makes sense on a nuclear physics level. Inertial interactions get funky at particle levels but in general, if you have a less dense object at a lower (but still relativistic) speed, it will fail to interact with a stationary object, and can sometimes pass through acting as a wave, not a particle. a higher density object of heavy particles (like the metal in sion) would actually have a harder time going through, even at extreme speeds. Chances are he'd cause a nuclear explosion if he really tried. While that would make the best team fight initiate ever, it sounds a little unbalanced. So, logic intervenes.
on a non-nerdy level, do you know how awesome his jungle ganks would be if that thing went through walls?!?!?!