Creatures your opponents control get -1/-0. {1}{U}, Discard Waker of Waves: Look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.
"And through the drifts the snowy cliffs Did send a dismal sheen: Nor shapes of men nor beasts we ken— The ice was all between." —Samuel Coleridge, "The Rime of the Ancient Mariner"
Defender At end of combat, exile all creatures blocked by Wall of Nets. When Wall of Nets leaves the battlefield, return all cards exiled with Wall of Nets to the battlefield under their owners' control.
Woolly Razorback enters with three ice counters on it. As long as Woolly Razorback has an ice counter on it, prevent all combat damage it would deal and it has defender. Whenever Woolly Razorback blocks, remove an ice counter from it.
Devoid When you cast this spell, exile target artifact, enchantment, or land. Reach {2}{C}, Sacrifice a land: Return World Breaker from your graveyard to your hand.
Flying, trample When Worldgorger Dragon enters, exile all other permanents you control. When Worldgorger Dragon leaves the battlefield, return the exiled cards to the battlefield under their owners' control.
Flying, trample At the beginning of your upkeep, sacrifice a creature other than Xathrid Demon, then each opponent loses life equal to the sacrificed creature's power. If you can't sacrifice a creature, tap Xathrid Demon and you lose 7 life.
Flying When Abhorrent Overlord enters, create a number of 1/1 black Harpy creature tokens with flying equal to your devotion to black. At the beginning of your upkeep, sacrifice a creature.
Flying Landfall — Whenever a land you control enters, you may exile target nonland permanent other than Admonition Angel. When Admonition Angel leaves the battlefield, return all cards exiled with it to the battlefield under their owners' control.
Flying At the beginning of your upkeep, you get {E}{E}{E}. Pay eight {E}: Return all other creatures to their owners' hands. Activate only as a sorcery.