Schuster also commented in the Facebook thread, stating that he believes they are the only graded set that exists
Eternal Witness, in particular, has some incredible synergies with the other themes in this deck
(It'll only be an Essence of the Wild, it won't be a land anymore.) Question #6 You control Humility and cast Arixmethes, Slumbering Isle
From there we cast Shape Anew, with Blightsteel Colossus being the only possible target in the deck to hit
If youve drawn a card you need to search for, this can be a way to find mana to cast it, but mostly this is a way to sacrifice artifacts you dont want in play anymore, such as a Torpor Orb when youve drawn Dockside, or, my personal favorite use, this can sacrifice Spine of Ish Sah to use it again, or, better yet, sacrifice a Sculpting Steel thats copying a Spine of Ish Sah to get the Sculpting Steel back, which allows you to destroy multiple permanents much more cheaply