My hunch is there are few decks that could make this work, ones that are trying to kill with Empty the Warrens, but in a fair way
If the top card of your library changes while you're casting a spell, playing a land, activating an ability, or taking a special action, you can't look at the new top card until you finish doing so
Thankfully it has a clause that stops it from being a crazy flicker target
Archetype Deck: Aluren | Masashi Oiso, 1st Place Grand Prix Boston 2005 Creatures (17) 1 Auriok Champion 1 Cloud of Faeries 1 Eternal Witness 3 Cavern Harpy 3 Raven Familiar 4 Birds of Paradise 4 Wall of Blossoms Instants (9) 2 Intuition 3 Vampiric Tutor 4 Brainstorm Sorceries (7) 3 Living Wish 4 Cabal Therapy Enchantments (4) 4 Aluren Artifacts (1) 1 Chrome Mox Lands (22) 2 Island 2 Swamp 1 Reflecting Pool 2 Yavimaya Coast 3 Polluted Delta 4 City of Brass 4 Havenwood Battleground 4 Llanowar Wastes Masashi Oiso has ten - ten - Pro Tour Top 8s
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Where prices take a jump are in the other monsters that populate the deck