So, lets get this started, shall we
Today we're checking out these decks that include supersized copies of their face commander
However, you can consider playing fewer than four copies of a card if: It gets worse in multiples (such as legendary creatures) It's only useful against certain matchups It's a win condition, and your control deck will have time to dig through the deck and find it You're stuck choosing between two cards which have equally strong, similar, but slightly different effects (you could play two of each) It's a slightly worse version of a card you have four copies of already, and you're including it because you want even more of that effect
Nazahn, Revered Blacksmith [Cat]: Tutor effect, that's great
You should run this artifact creature when you have artifact synergies, especially with cards like Indomitable Archangel and Urza, Prince of Kroog that benefit from becoming artifacts themselves
You could fill the deck with all the Buried AliveBuried Alive and EntombEntomb of the world, alongside a ton of cheap mana rocks that will both serve as ramp and enablers and some major monsters