Wizards of the Coast has banned Thassa’s Oracle in Magic: the Gathering’s Historic format.

“While Thassa’s Oracle is a powerful card that has created combo decks across multiple formats, until recently, it wasn’t a force to be reckoned with in Historic,” Wizards said. “However, with the recent printing of Tainted Pact and the fine-tuning of that archetype, we’ve seen the rise of the two-card combo in Historic to the point that half the field for the past League Weekend utilized the combo.”

“Due to the power of the two-card combination, and because we expect that Thassa’s Oracle is likely to cause problems down the road as Historic continues to add new cards, Thassa’s Oracle is banned in Historic,” they concluded.

Thassa’s Oracle has been a key card in a few different combo decks since it was released in Theros Beyond Death. It broke through in the first major Pioneer tournament, Players Tour 1, in combination with Inverter of Truth as a part of the Dimir Inverter deck. The combination proved too powerful for Pioneer and resulted in the banning of Inverter of Truth.

But it only recently began making waves in Historic with the addition of Tainted Pact to the format via Strixhaven, which was officially released on April 23.  Tainted Pact was included as part of the set’s Mystical Archive, which made the card legal in Historic because every Mystical Archive cards was added to MTG Arena. Players quickly realized that you could build a deck full of one-ofs in order to allow Tainted Pact to mill your entire deck and win with the enters the battlefield trigger on Thassa’s Oracle.

Seven Mystical Archive cards were banned from Historic before their release—Channel, Counterspell, Dark Ritual, Demonic Tutor, Lightning Bolt, Natural Order, and Swords to Plowshares—and Tainted Pact appears to be the first card from the Mystical Archive to to directly result in a card other than itself getting banned in the format.

Historic Dimir Pact by Paulo Vitor Damo da Rosa

Creatures (3)
Thassa’s Oracle
Augur of Bolas

Spells (27)
Agadeem’s Awakening
Baleful Mastery
Cling to Dust
Expansion /// Explosion
Fatal Push
Grim Tutor
Inquisition of Kozilek
Mastermind’s Acquisition
Memory Lapse
Mystical Dispute
Narset’s Reversal
Pact of Negation
Ritual of Soot
Silundi Vision
Solve the Equation
Tainted Pact
Thought Erasure
Yahenni’s Expertise

Artifacts (4)
Aether Spellbomb
Mind Stone
Scrabbling Claws
Wishclaw Talisman

Enchantments (1)
Omen of the Sea
Lands (25)
Snow-Covered Island
Snow-Covered Swamp
Barkchannel Pathway
Barren Moor
Blightstep Pathway
Bojuka Bog
Brightclimb Pathway
Castle Locthwain
Castle Vantress
Clearwater Pathway
Darkbore Pathway
Drowned Catacomb
Fabled Passage
Fetid Pools
Hallowed Fountain
Hengegate Pathway
Ice Tunnel
Ifnir Deadlands
Lonely Sandbar
Riverglide Pathway
Temple of Deceit
Watery Grave
Zagoth Triome

Sideboard (15)
Mazemind Tome
Legion’s End
Heartless Act
Bloodchief’s Thirst
Glimpse of Freedom
Shadows’ Verdict
Test of Talents
Swan Song
Noxious Grasp
Cry of the Carnarium
Thought Distortion
Tyrant’s Scorn
Lurrus of the Dream-Den
Pack Rat

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