Attack Speed + Armour item Concept

First, I'll be spelling it "armour". I'm Canadian, deal with it. With that out of the way, I'm making this concept to help fill the void of an item that grants both armour and attack speed. Wit's End fills the same niche, but for magic resist and it's a very interesting and useful item for attack speed reliant tanks and bruisers like Volibear, Warwick, and Shyvana. With that role in mind, I came up with this;

#Clouded Shield ###A shield forged from the scales of the legendary cloud drakes. Unbreakable and as swift as the wind. ##Stats +50% attack speed +60 armour ##Passive UNIQUE - RELENTLESS CHASE: Basic attacks deal 15 bonus physical damage on-hit and grant 6-15% (based-on-level) movement speed for 1 second. ##Limitations Can only be purchased on melee champions. ##Recipe + + + 700 Gold 2800 Total Gold