Rise Among the Worthy

Search your library for up to five different creatures that don't share a color and exile those creatures and Rise Among the Worthy.
For the rest of the game, you may pay X life during your upkeep. If you do, cast a creature exiled with Rise Among the Worthy without paying its mana cost where X is its converted mana cost.
"Submit to greater power- and the brand new set Amonkhet." -Nicol Bolas