The set has fifteen legendary creatures, and there are black Humans, including Captain Sisay and Teferi, with Rafiq and Kresh being arguable diverse Human inclusions as well
Even though you can only have 2 copies of a card in a deck, you can still buy as many of these item cards as you need
While the cards all have unique drawbacks or restrictions, the staples among them will almost never be dead cards
-- If multiple players each control one or more Knowledge Pools, the active player put their triggered abilities on the stack in any order, then each other player in turn order does the same
If I ever get to start with one in play before Jund can cast a discard spell, its going to be hard to lose
Both of these are already expensive cards in their own right, and therefore start out as quite pricey cards, especially in foil