Gyruda Doom of Depths

“Companion — Your starting deck contains only cards with even converted mana costs. <em>(If this card is your chosen companion, you may cast it once from outside the game.)</em> <br> When Gyruda, Doom of Depths enters the battlefield, each player puts the top four cards of their library into their graveyard. Put a creature card with an even converted mana cost from among those cards onto the battlefield under your control.”