Enigma Sphinx [Commander 2018] Wizards Play Network 2009 They only specify the consequences

They only specify the consequences should you fail

{3}{U}{U}: Mist Dragon phases out

" —Sitrik

Set: Fate Reforged Type: Sorcery Rarity: Rare Cost: {4}{R}{R} Choose one —

Set: Battle for Zendikar Prerelease Promos Type: Creature — Elemental Rarity: Rare Cost: {3}{G} Vigilance

Enigma Sphinx [Commander 2018] Wizards Play Network 2009 They only specify the consequencesSet: Commander 2018 Type: Artifact Creature Sphinx Rarity: Rare Cost: {4}{W}{U}{B} Flying When Enigma Sphinx is put into your graveyard from the battlefield, put it into your library third from the top. Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)