If you do not have a way to counter it, keep your opponents board clear or their graveyard empty, you will never get rid of Recurring Nightmare
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Abzan Banner Acquisition Octopus Adrestia Adventurer's Airship Aether Spellbomb Aether Syphon Agent's Toolkit Aladdin's Lamp Alchemist's Vial Alhammarret's Archive Altar of the Wretched Angelheart Vial Angler's Shield Anvil of Bogardan Arcane Encyclopedia Arcane Spyglass Architects of Will Arcum's Astrolabe Arm-Mounted Anchor Assassin Gauntlet Astrolabe Astrologian's Planisphere Autograph Book Avarice Amulet Azor's Gateway Azorius Cluestone Bag of Devouring Bag of Holding Bagel and Schmear Balamb Garden, Airborne Baleful Strix Bandit's Haul Barbed Servitor Barbed Sextant Bargaining Table Basilica Skullbomb Bespoke Battlewagon Bident of Thassa Big Wheel Bilbo's Ring Biorganic Carapace Bladecoil Serpent Blitzball Stadium Blood Fountain Blood Servitor Bloodletter Quill Blurry Beeble Bomat Bazaar Barge Booby Trap Book of Rass Boosted Sloop Boros Cluestone Bottled Cloister Braided Quipu Brass Infiniscope Brass Secretary Brass's Tunnel-Grinder Buster Sword Buzz Bots Buzzing Whack-a-Doodle Candles of Leng Candlestick Candy Trail Canoptek Spyder Carnage Altar Ceremonial Knife Chandra's Regulator Chromatic Orrery Chromatic Sphere Chromatic Star Chronicle of Victory Chronomancer
Marina Vendrell's Grimoire I'm sure Marina Vendrell's Grimoire is broken somewhere, but it's hard to image a world where this doesn't make it easier for your opponents to kill you
Also, though it many cost a lot to buy a booster box, some simple math will prove that its often better to buy one booster box than the equivalent in separate packs
In both games, a destroyed monster/creature or a used spell card will go right into such a zone, where it's effectively buried and gone
