As youve no doubt already guessed, this deck is all about making and using energy
Mammoth Harness is another interesting attempt at MTG trying to do a 'vehicle' or 'mount', with the enchantment simulating a creature getting on the mammoth
Going Wide Going Wide Since the deck wants to go wide you might as well try to use that to your advantage in different ways
Suppression Ray is the only one I have some doubts about, and while Bloodsoaked Insight is a little situational, its a powerful effect
I'm sure some of you used context clues to get to "it has concept art," which is true, but there's a ton more
That's the big one, clearly the main reason for why WotC is jumping through so many hoops here, and it's really huge: It keeps Arena and MTGO metagames aligned with tabletop, and it makes Standard a format thats playable on all platforms