Well, with the party mechanic coming down the line in Zendikar Rising , those madmen in the Tabletop Studio figured out a way to do it
Magic: The Gathering has specific ways it represents story elements through its gameplay, and I'm happy to see that these mechanics were translated so well to create an authentic-feeling Final Fantasy experience that goes much deeper than Cactuar's 9999 damage ability
The choice is the players
You can then pay one green mana and tap Selvala to generate mana in whatever colors you want equal to the highest power among your creatures
Aven Mindcensor I love Death and Taxes strategies, and in some formats like Modern where fetch lands are prevalent, slamming an Aven Mindcensor when the land search ability is still on the stack is priceless
At the same time, the Hero deck required fewer lands, which meant that the Rat deck was more likely to get mana flooded (by virtue of needing to build with more lands in the deck)