Its not particularly common to see a foil treated filler card, for sure
The only thing that is a bit disappointing about Shadowspear is it doesn't interact with shroud, which is super relevant since the most played equipment by a mile is Lightning Greaves
If trouble arises while scanning holographic, foil or otherwise highly reflective cards we recommend a simple diffuser (e.g a sheet of paper) to block excess light
For three mana you can call in another Knight (also with vigilance, notably), and for one mana you can tap some of your other Knights to remove a threat on the board
On defense, the pump the equipped creature gets is actually dependent on how many creatures are attacking you
Nin sits at the right mana cost and is open-ended enough that you can be perceived as a pinger deck when in reality you could conceivably be working to mill somebody out