(Real) Ninja Tabi's
I personally love ninja tabi's, great for tanking. But I don't think of ninjas as tanks. To better suit the name I thought of a "different" Unique Passive. Instead blocking 10% of the damage from basic attacks one can Dodge them! Dodge - Unique Passive: Players have a 15% chance to dodge incoming auto attacks. Auto attacks can only be dodge once every 8 seconds from the same champion/monster. Dodging an empowered auto attack (Draven Q, Sona Passive, Renekton W...) will cancel all on-hit effects as with item empowered auto attacks (Static Shiv, Sheen). Champions can only Dodge other champions, large jungle monsters, siege minions, and super minions auto attacks.
I didn't "math" it all out but it seemed like a good idea. 