Botez Twins, Strategic Duelist

Master Strategists – Whenever Botez Twins, Strategic Duelists enters the battlefield or attacks, you may look at the top three cards of your library. Exile one face down as a "move," put one into your hand, and the other on the bottom of your library.

Checkmate Mechanics - {2}{w}{u}, Tap: Choose a face-down card you own in exile. Reveal it. If it’s an instant, sorcery, or enchantment, you may cast it without paying its mana cost.