Remove target creature from the game if Parallax Wave is in play. This wording means if the Wave is no longer in play when its activated ability tries to resolve, the target creature won't be removed from the game. Target opponent removes a card in his or her hand from the game if Parallax Nexus is in play. Play this ability only if you could play a sorcery. The corrected wording stops weird tricks involving Parallax Wave removing itself from the game while Opalescence is in play.
Nothing is put into play.
When Stronghold Gambit resolves, everyone reveals a card, but only the creature cards and their mana costs matter. Noncreature cards simply stay in their owners' hands. This means you can target only the creature with the greatest power when you play Topple. All rights reserved.