Green Sun's Zenith 
Sorcery
Search your library for a green creature card with converted mana cost X or less, put it onto the battlefield, then shuffle your library. Shuffle Green Sun's Zenith into its owner's library.
- [EMA] Eternal Masters #169 (R)
- [MBS] Mirrodin Besieged #81 (R)
- [V13] From the Vault: Twenty #19 (M)