Similar to Commander, Oathbreaker decks are made up of 58 cards plus two cards in the command zone: a planeswalker (the Oathbreaker) and an instant/sorcery that can only be cast if the Oathbreaker is on the battlefield.
These cards cannot be used in this format:
Ad Nauseam · Ancestral Recall · Balance · Biorhythm · Black Lotus · Channel · Chaos Orb · Cleanse · Crusade · Dark Ritual · Doomsday · Emrakul, The Aeons Torn · Expropriate · Falling Star · Fastbond · Gifts Ungiven · Griselbrand · High Tide · Imprison · Invoke Prejudice · Jeweled Lotus · Jihad · Library Of Alexandria · Limited Resources · Lion's Eye Diamond · Mana Crypt · Mana Geyser · Mana Vault · Mox Emerald · Mox Jet · Mox Pearl · Mox Ruby · Mox Sapphire · Natural Order · Painter's Servant · Panoptic Mirror · Pradesh Gypsies · Primal Surge · Saheeli, The Gifted · Shahrazad · Sol Ring · Stone-throwing Devils · Sundering Titan · Sylvan Primordial · Time Vault · Time Walk · Tinker · Tolarian Academy · Tooth And Nail · Trade Secrets · Upheaval · Yawgmoth's Bargain · alle Ante/Conspiracy Karten
These cards are also legal in this format, despite not being part of the sets above:
"lifetime" Pass Holder · _____ _____ _____ Trespasser · _____ _____ Rocketship · _____ Balls Of Fire · _____ Bird Gets The Worm · _____ Goblin · _____-o-saurus · A Good Day To Pie · Aerialephant · Ambassador Blorpityblorpboop · Atomwheel Acrobats · Attempted Murder · Baaallerina · Balloon Stand · Bamboozling Beeble · Big Winner · Bioluminary · Black Hole · Blood Crypt · Blorbian Buddy · Boing! · Bounce Chamber · Breeding Pool · Bumper Cars · Captain Rex Nebula · Carnival Carnivore · Celebr-8000 · Centaur Of Attention · Chicken Troupe · Circuits Act · Clandestine Chameleon · Clown Car · Clown Extruder · Clowning Around · Comet, Stellar Pup · Coming Attraction · Command Performance · Complaints Clerk · Concession Stand · Costume Shop · Croakid Amphibonaut · Deadbeat Attendant · Dee Kay, Finder Of The Lost · Discourtesy Clerk · Dissatisfied Customer · Done For The Day · Down For Repairs · Draconian Gate-bot · Drop Tower · Eelectrocute · Embiggen · Exchange Of Words · Ferris Wheel · Fight The _____ Fight · Finishing Move · Foam Weapons Kiosk · Forest · Fortune Teller · Glitterflitter · Goblin Airbrusher · Godless Shrine · Grabby Tabby · Hall Of Mirrors · Hallowed Fountain · Haunted House · Information Booth · Island · Kiddie Coaster · Last Voyage Of The _____ · Line Cutter · Lineprancers · Magar Of The Magic Strings · Make A _____ Splash · Merry-go-round · Minotaur De Force · Monitor Monitor · Monoxa, Midway Manager · Motion Sickness · Mountain · Myra The Magnificent · Night Shift Of The Living Dead · Non-human Cannonball · One-clown Band · Overgrown Tomb · Pair O' Dice Lost · Park Bleater · Petting Zookeeper · Pick-a-beeble · Pin Collection · Plains · Priority Boarding · Prize Wall · Proficient Pyrodancer · Quick Fixer · Rad Rascal · Resolute Veggiesaur · Ride Guide · Robo-piñata · Roller Coaster · Roxi, Publicist To The Stars · Sacred Foundry · Sanguine Sipper · Saw In Half · Scampire · Scared Stiff · Seasoned Buttoneer · Six-sided Die · Slight Malfunction · Soul Swindler · Space Beleren · Spinnerette, Arachnobat · Spinny Ride · Squirrel Squatters · Starlight Spectacular · Steam Vents · Step Right Up · Stiltstrider · Stomping Ground · Storybook Ride · Strength-testing Hammer · Swamp · Swinging Ship · Sword-swallowing Seraph · Temple Garden · The Most Dangerous Gamer · The Space Family Goblinson · Ticket Turbotubes · Ticketomaton · Trash Bin · Tunnel Of Love · Tusk And Whiskers · Unlawful Entry · Vedalken Squirrel-whacker · Vegetation Abomination · Watery Grave · Wee Champion · Wicker Picker · Wizards Of The _____ · Wolf In _____ Clothing · Xenosquirrels