Well then, why not put in two gold cards, one featuring Mega Dragonite, then other Mega Charizard Y, and then the most astonishingly detailed Special Illustration Rare of Gengar
Everyone's pretty sure that Nadu will be the next card added to the MTG banlist - even the Pro Tour winner - but there are other decent targets in the format right now
More lines on a card not only makes it harder to parse from a voting standpoint, but also frequently indicates a card is doing too much
If you control more than one creature with "This creature can't attack or block alone" they can attack or block together, even if no other creatures attack or block
Lack of new mechanics make this deck extra accessible for new Draft & Commander players
The multicolor uncommons, which are normally excellent signposts, underscore this nicely: WU Tempo Skies feat