Yennett, Cryptic Sovereign

Yennett, Cryptic Sovereign

Legendary Creature - Sphinx | Power/Toughness: 3 / 5 (CMC 5)
Flying, vigilance, menace
Whenever Yennett, Cryptic Sovereign attacks, reveal the top card of your library. You may cast it without paying its mana cost if its mana value is odd. If you don't cast it, draw a card.