If these are indeed real, then a possibility of a printing error is not out of the question as to how the leaker got a hold of these cards
Craft with six artifacts (, Exile this artifact, Exile the six from among other permanents you control and/or cards from your graveyard: Return this card transformed under its owner's control
His sequential abilities bring to mind cards like Omnath, Locus of Creation and Nissa, Resurgent Animist, both of which are now classics in the format
They feature six cards of the associated color to show what it does best (as far as Wizard's says) as well as special copies of Sol Ring and Command Tower, also themed to the slice of the color pie
Utilizing any one of these at scale is a game-altering deal
In fact, Gerard Fabiano (somehow, that name always comes up in my lists) used that exact trick to beat Patrick Sullivan at The Grandest Prix