Its a lot of mana to drain them, and you cant even always do it, and its hard to evaluate how good it is to scry whenever a creature dies
Notably, Sultai Arisen also breaks the trend of Spirit Dragons being awful in the precon, with Teval actually supporting the graveyard strategy (and the main deck Teval is also great in it)
Terra, Herald of Hope Ive seen lots of chatter comparing Terra, Herald of Hope to Alesha, Who Smiles at Death, attempting to categorize one as strictly better than the other and thats a lost cause
Nazgul has an unusual effect, as it's one of the few MTG cards that lets you break deck building restrictions of whatever format you're playing in
It taps with two to toss a charge counter here and then draw a card for them
The top three begin with a stunning version of Kozilek, the Broken Reality that tips the scales with a price point over $1,500