Lord of the Void
Creature — Demon
Flying
Whenever this creature deals combat damage to a player, exile the top seven cards of that player's library, then put a creature card from among them onto the battlefield under your control.
Chris Rahn
Ravnica Remastered (RVR)
• #81Rulings
Lord of the Void’s ability isn’t optional. If there is a creature card among the seven cards you exiled, you must put one onto the battlefield under your control.
(wotc • 2013-01-24)
Rulings
Lord of the Void’s ability isn’t optional. If there is a creature card among the seven cards you exiled, you must put one onto the battlefield under your control.
(wotc • 2013-01-24)