Gyruda, Doom of Depths

Companion — Your starting deck contains only cards with even converted mana costs. <i>(If this card is your chosen companion, you may cast it once from outside the game.)</i>

When Gyruda 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.