Unfortunately, unlike some of the best Rainbow Secret Rares from Sun & Moon, Reshiram and Zekrom's shared scene with N is incredibly detailed, making the rainbow recolor more of a distraction than an enhancement
If you draw a Castle Ardenvale at any point, you don't run out of ways to make vigilant flying 4/4's
Once it is in play, you get a beefy 30,000 power card that has an effective secondary Activate ability
The Wind Crystal gives the discount of Pearl Medallion, with a lifegain doubler, and a late game way to jump the team and gain even more life
The Arena client lacks the infrastructure for fourplayer matches, and the card pool does not yet include the tens of thousands of cards legal in paper Commander
(For the Cover Only) Elephant's Foot Compensation (or similar setting) set to 0 or OFF