Vizier of the Menagerie 
Creature — Snake Cleric
You may look at the top card of your library any time. You may cast creature spells from the top of your library. You can spend mana of any type to cast creature spells.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL