The Great Mending(or just the Mending) was a process that healed Dominaria from the damage caused by the time rifts through the sacrifice of multiple planeswalkers.
Pauper: Peregrine Drake will be banned in Pauper
Standard: Emrakul, the Promised End is banned. Smuggler's Copter is banned. Reflector Mage is banned.
Modern: Gitaxian Probe is banned. Golgari Grave-Troll is banned.
Legacy: Sensei's Divining Top is banned.
Standard: Attune with Aether is banned. Rogue Refiner is banned. Rampaging Ferocidon is banned. Ramunap Ruins is banned.
Modern: Jace, the Mind Sculptor is unbanned. Bloodbraid Elf is unbanned.
Legacy: Deathrite Shaman and Gitaxian Probe are banned
Standard: Standard Rotation Kaladesh
Modern: Krark-Clan Ironworks is banned.
Pauper: Gush, Gitaxian Probe, and Daze are banned.
Modern: Bridge from Below is banned.
Standard: Rampaging Ferocidon is unbanned.
Modern: Hogaak, Arisen Necropolis banned. Faithless Looting is banned. Stoneforge Mystic is unbanned.
Standard: Throne of Eldraine Rotation
pioneer: Announcing the Pioneer Format
Standard: Field of the Dead is banned.
Pauper: Arcum's Astrolabe is banned.
pioneer: Felidar Guardian is banned. Leyline of Abundance is banned. Oath of Nissa is banned.
pioneer: Veil of Summer is banned.
Standard: Oko, Thief of Crowns is banned. Once Upon a Time is banned. Veil of Summer is banned.
Legacy: Wrenn and Six is banned.
pioneer: Once Upon a Time, Field of the Dead, Smuggler's Copter are banned
pioneer: Oko, Thief of Crowns is banned. Nexus of Fate is banned.
Modern: Mox Opal is banned. Oko, Thief of Crowns is banned. Mycosynth Lattice is banned.
Modern: Once Upon a Time is banned
Legacy: Underworld Breach is banned
Legacy: Lurrus of the Dream-Den is banned. Zirda, the Dawnwaker is banned.
Standard: Agent of Treachery is banned. Fires of Invention is banned. Companion Rules Change
pioneer: Companion Rules Change
Modern: Companion Rules Change
Legacy: Companion Rules Change
pioneer: Oath of Nissa is unbanned.
Modern: Arcum's Astrolabe is banned.
Pauper: Expedition Map is banned. Mystic Sanctuary is banned.
Standard: Wilderness Reclamation is banned. Growth Spiral is banned. Teferi, Time Raveler is banned. Cauldron Familiar is banned.
pioneer: Inverter of Truth is banned. Kethis, the Hidden Hand is banned. Walking Ballista is banned. Underworld Breach is banned.
Historic: Field of the Dead is banned.
Standard: Format Rotation
Standard: Uro, Titan of Nature's Wrath is banned
Standard: Omnath, Locus of Creation is banned. Lucky Clover is banned. Escape to the Wilds is banned.
Historic: Omnath, Locus of Creation is suspended. Teferi, Time Raveler is banned. Wilderness Reclamation is banned. Burning-Tree Emissary is unsuspended.
Pauper: Fall from Favor is banned.
pioneer: Balustrade Spy is banned. Teferi, Time Raveler is banned. Undercity Informer is banned. Uro, Titan of Nature's Wrath is banned. Wilderness Reclamation is banned.
Modern: Field of the Dead is banned. Mystic Sanctuary is banned. Simian Spirit Guide is banned. Tibalt's Trickery is banned. Uro, Titan of Nature's Wrath is banned.
Legacy: Arcum's Astrolabe is banned. Dreadhorde Arcanist is banned. Oko, Thief of Crowns is banned.
Historic: Omnath, Locus of Creation is banned (from suspended). Uro, Titan of Nature's Wrath is banned.
Historic: Thassa's Oracle is banned.
Historic: Time Warp is banned.
Historic: Brainstorm is suspended.
Pauper: Chatterstorm is banned. Sojourner's Companion is banned.
Standard: Format rotation
Historic: Tibalt's Trickery is banned in Historic. Memory Lapse is suspended in Historic. Brainstorm is banned in Historic (from suspended).
Alchemy: Format is created
Pauper: Atog is banned. Bonder's Ornament is banned. Prophetic Prism is banned.
Standard: Alrund's Epiphany is banned. Divide by Zero is banned. Faceless Haven is banned.
Legacy: Ragavan, Nimble Pilferer is banned.
Historic: Memory Lapse is banned (from suspended). Teferi, Time Raveler has been rebalanced and unbanned.
Alchemy: Cards Rebalancements
pioneer: Lurrus of the Dream-Den is banned.
Modern: Lurrus of the Dream-Den is banned.
Pauper: Galvanic Relay is banned, Disciple of the Vault is banned, Expedition Map is unbanned.
Explorer: Explorer format is created
Explorer: Winota, Joiner of Forces is banned. Tibalt's Trickery is banned.
pioneer: Winota, Joiner of Forces is banned. Expressive Iteration is banned.
Explorer: Expressive Iteration is banned.
Historic: Winota, Joiner of Forces is unbanned. Various cards are rebalanced.
Alchemy: Grinning Ignus is banned. Various cards are rebalanced.
Standard: Standard Rotation
Alchemy: Alchemy Rotation
Pauper: Aarakocra Sneak is banned. Stirring Bard is banned. Underdark Explorer is banned. Vicious Battlerager is banned.
Standard: The Meathook Massacre is banned.
Modern: Yorion, Sky Nomad is banned.
Legacy: Expressive Iteration is banned. White Plume Adventurer is banned.
Standard: Fable of the Mirror-Breaker // Reflection of Kiki-Jiki is banned. Invoke Despair is banned. Reckoner Bankbuster is banned.
Modern: Preordain is unbanned.
Legacy: Mind’s Desire is unbanned.
Currently doing updates, some information might not be entirely accurate. Check again in a few minutes.