+zenith, "Mirrodin Besieged" (5)
Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.
Target player draws X cards. Shuffle Blue Sun's Zenith into its owner's library.
Search your library for a green creature card with mana value X or less, put it onto the battlefield, then shuffle. Shuffle Green Sun's Zenith into its owner's library.
Red Sun's Zenith deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead. Shuffle Red Sun's Zenith into its owner's library.
Create X 2/2 white Cat creature tokens. Shuffle White Sun's Zenith into its owner's library.
Gatherer works better in the Companion app!