This list is an ongoing effort to keep track of all retcons in Magic's (revisionist) continuity. Suggestions for further additions or improvements to the layout of the list are always welcome, and so is help with reconstructing the month and the source in which the older retcons on the list were implemented.
Mirrodin- The nature and origin of the oil was changed from being an unfinished weapon that was accidentally brought to Mirrodin by Karn and Jeska (
Scourge) to being normal glistening oil from Karn's leaking heartstone
- [9/2010] Mirrodin was stated to be devoid of life at the end of
The Fifth Dawn, which was retconned in
Scars of Mirrodin- [9/2010] Changes to the plane itself that had been established in the original novel trilogy such as vedalken being mutated, blinkmoths being extinct or the Mephidross having swallowed most of Mirrodin's surface were ignored in
Scars of MirrodinShandalar- The Onakke were stated to be trolls in the deck insert of
Duel Decks: Garruk vs. Liliana but later retconned to be ogres
Theros- [9/2013] Elspeth was stated to go travelling with Karn at the end of
The Quest for Karn, which was retconned to her fleeing to Theros instead in 'The Lost Confession'
Magic Origins- [6/2015] Chandra's origin story 'Fire Logic'
- [6/2015] Liliana's origin story 'The Fourth Pact'
- [6/2015] Jace's origin story 'Absent Minds'
- [7/2015] Gideon's origin story 'Kytheon Iora of Akros'
- [7/2015] Nissa's origin story 'Home'
Zendikar- Depending on how you read previously established info about Ob Nixilis, him being demonified by the Chain Veil and having his spark supressed by Nahiri (instead of him being messed up by Zendikar's mana) is a retcon
- The nature of the Eldrazi works differently now (that's actually several retcons, e.g. changes to their physical nature, their characteristics being redefined in the Zendikar artbook etc.)
- Sorin's part in imprisioning them was removed/changed
- Sorin's age was changed. He started out as about 6.000 years old, but then they said the Eldrazi's imprisoning was 6.000 years ago and that Sorin was already incredibly old back then
- The vampires of Zendikar didn't play a role in luring the Eldrazi to Zendikar after the retcons
- Said vampires were shown worshipping an Eldrazi titan when they should actually hate the Eldrazi and know the truth about them
- The vampires' involvement in trapping the Eldrazi was retconned a second time from "just kinda there" to "vampires didn't even exist back then"
- Zendikar's vampires were created by the eldrazi now, which is a return to the idea that vampires were around at the time of the titans' imprisonment and therefore Nahiri has no reason to be surprised that there are vampires on Zendikar 5.000 years later
- They might've retconned how the eldrazi-binding seals on Zendikar worked, though I'm too confused to tell for sure...
Innistrad- Sorin being surprised Nahiri doesn't show up in
Teeth of Akoum is contradicted by the reveal that he had locked her into the Helvault
Ravnica- [6/2015 + 8/2016] The Interregnum established in
Agents of Artifice was ignored in 'Absent Minds', a retcon that was further elaborated on in 'Homesick'
Regatha- [8/2016] According to the short story 'Homesick', Chandra now never told Gideon her origin story, which means the ending of
The Purifying Fire can't have happened, which technically means none of Chandra and Gideon's appearances in any block can have happened either
- [1/2017] The short story 'Burn' changed the part about Chandra not telling Gideon her origin story, putting the ending of TPF back into canon while establishing that the origin story in TPF was a distorted version made up by Chandra
Amonkhet- [4/2017] A version of the short story 'The Writing on the Wall' that hinted at a possible future romance between Chandra and Nissa was published canon for several hours before the part in question was edited out
Test of Metal(The canonicity of Test of Metal is complicated by the fact that Tezzeret uses Clockworking to find an alternate reality where the events of the novel didn't happen and makes it reality, so the novel effectively undoes itself. There might have been further retcons to the book that can't be fully explained by Clockworking, and for the sake of clarity and completeness, specific points that have been contradicted by later sources will be added.)
- [7/2015] The short story 'Catching Up' established that Jace hadn't seen Liliana since the day he'd realised she was playing him and thus didn't acknowledge them meeting in
Test of Metal [10/2010]
Ixalan- [9/2017] The short story 'The Talented Captain Vraska' serves as in-text confirmation that all gorgons are now considered to have to actively switch on their gaze by magic and that it takes conscious effort. This contradicts several earlier sources featuring gorgons, such as
Ravnica, City of Guilds,
TheWild Son and 'Xathrid Gorgon'.
Dominaria- [9/2017] The short story 'The Talented Captain Vraska' strongly contradicts the rules for entering the Meditation Plane established in
Champion's Trial. It is now portrayed as possible to physically planeswalk to the Meditation Plane and to do so from outside of Dominaria.
- [4/2018]
Alara Unbroken established that Oldwalkers started aging at an accelerated rate after the Mending:
For decades he [Bolas] had felt his age catching up to him; his age was an imposing enough figure that he felt deeply invested in eluding the arithmetic. [...] The impact of the damnable Mending had left him broken. His omnipotence was mutilated, and his mind felt like a sieve. He was truly an elderly dragon.This rule was contradicted by Kelly Digges on twitter and ignored with the release of
Dominaria when an elderly Jaya Ballard appeared in the story.
("They began aging again at a normal rate--no "catching up." Liliana took many years to become an old woman post-Mending.")
https://twitter.com/kellydigges/status/ ... 4946983936