This was a mainstay of infect decks when the archetype thrived in Modern, which should give you a good idea of where it's most useful
Me, Id still run all copies of Nazgl that I can put in the deck, because honestly, when are you ever going to have all nine of them along with Witch-king on the battlefield
The player introductory space gets crowded with beginner boxes, Standard precons and Foundations Commander decks, but I expect to see another Starter Kit within the year
However, it could always have just been an oversight when presenting the deck for the video after winding up a long day
While he does cost a steep 6 mana to cast, he also comes with an ETB tutor trigger, and if it's Hammer of Nazahn he even saves you the mana to cast it
It was a bag of 28 of the weirdest cards I'd ever laid eyes on