If prowess isn't the plan, then cards like
Expedite aren't great when all your creatures are hasty. Here's the deck in a nutshell
Start with a UR Prowess deck
Remove Abbot, making the deck less explosive and removing card advantage
Add Weaponsmith making the deck much slower
Add
Hero's blade, making it inconsistent - the blade only works with 1 creature
It's strictly worse than a cookie-cutter UR prowess deck. To do something interesting with
Hero's Blade, you want more legendaries.