Cosmic Vortex

If a planeswalker card or eldrazi creature card would enter the battlefield, exile it until Cosmic Vortex leaves the battlefield instead.
{x}{b}{b}: Exile target planeswalker card or eldrazi creature card with a converted mana cost of x or less until Cosmic Vortex leaves the battlefield.
{3}{b}{b}: Cosmic Vortex gains indestructible until end of turn.