The mill caused by the attack trigger can turn into massive resource advantage though is likely to help an opposing deck or two, but any scries or top deck manipulation goes awry fast with Locke
The Uncommon allows players to put up to nine copies of the wraith knight into a deck, which is very powerful in a format like Commander, where players can only have one copy of a card unless otherwise specified
Some amount of raw power is always good, but synergy is what can make a deck shine
In sideboarding, continue to pay close attention to your creature count, your mana curve, and the other important details of your deck's composition
Lutri, the Spellchaser was controversially (and correctly, in my opinion) banned from Commander on release as itd otherwise be an auto-include in any deck playing blue and red (almost any Commander deck fulfills the companion restriction, as this was clearly not designed for Commander)