A common card that is a staple in popular formats, like an Alpha Lightning Bolt, can be worth hundreds, while countless bulk rares are worthless
Decks With This Card Recent public and tournament decks using Sextet Summon
One reason for this, Rasmussen says, is: "I don't know that it's going to be a strictly power level sort of thing." He gives the example of Lotus Petal - not the most powerful mana accelerant, but a card that raises eyebrows, and might warrant a higher place on the table than might be expected
These massive monsters are so powerful, there can only ever be one of them on the field at a time
This is going in every Ninja and Rogue EDH deck ever built or to be built, and on top of that I suspect its set to be a casual favourite too