I'm always a fan of the art you do for these concepts.
For the shield nulifying the enemy's skill, do you mean you're completely invulnerable to the first hit? If so, that's extremely strong for a T2 item, just because some powerful moves (Like Abram's charge, Geist Bomb, Lash's stomp or Infernus's Ult) could be completely dodged. That's mainly a problem since it's pretty easy to reach max stacks (you could walk in a circle for 10 seconds if need be).
I do like the idea behind this item, though it seems a bit strong for it's worth. Perhaps the full shield could just reduce incoming that first hit's damage by 50% instead?