, Konami seems to dislike printing Pendulum monsters because they were difficult to balance when the mechanic was first released, and they ruined one competitive format
Zendikar Rising also sees the return of the Kicker mechanic, where you can put extra mana into spells to do extra things
To give an example from a different series, the Pikachu & Zekrom-GX card is marked SM9
This utility is already fulfilled by Keldeo-EX in the Expanded format, so Zoroark might not see much play there, but he can fulfill that role for Standard
While you might think that being forced to play only Humans would be a significant downside, it turns out there are so many cheap, powerful Humans in the game that Humans was a tier-one Modern deck for a couple of years prior to Modern Horizons
Sure, the price tag is steeper than standard boxes, but the guaranteed premium cards and increased odds of scoring valuable pulls seem to make it worthwhile for enthusiasts