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It is 1 of the large unsolved mysteries of the Warhammer 40,000 beingness — astatine least, it was. Via a caller codex, Games Workshop has yet revealed the existent quality of the much-debated Terminus Decree — and immoderate Warhammer 40,000 lore fans truly privation it hadn’t.
The Terminus Decree, for the uninitiated, is the last bid issued to the Grey Knights, possibly the astir mysterious section of Space Marines successful the setting, earlier the Emperor was placed wrong the Golden Throne pursuing his mortal wounding by the Warmaster Horus astatine the extremity of the Horus Heresy.
(For much connected the Emperor's current... situation, cheque retired this nonfiction here.)
The thought is that lone the Supreme Grand Master of the Grey Knights tin unfastened The Terminus Decree and observe what, exactly, this last bid entails. Essentially, it’s a ‘break solid successful lawsuit of emergency’ Pandora's container — and Warhammer 40,000 fans person wondered what was wrong for years.
Now, with the merchandise of the caller Grey Knights codex (a publication packed with inheritance lore, pictures of miniatures for usage connected the tabletop game, and caller rules to play astir with), Games Workshop has for the archetypal clip revealed what The Terminus Decree really involves.
Warning! Spoilers for Warhammer 40,000 lore follow:
A azygous transition successful the caller Grey Knights codex has lit up Warhammer 40,000 lore fans, arsenic it reveals the eventual work of the Grey Knights is to either termination oregon re-entomb the Emperor wrong the Golden Throne, should helium ever effort to leave, beryllium reborn, oregon ascend to godhood. This is The Terminus Decree: an ultra-secret doomsday device, a contingency container near by the Emperor himself that would person the Grey Knights unit him backmost onto the Golden throne, should helium ever retrieve and situation to permission it.
New Grey Knights Codex "explains" The Terminus Decree
...what?
WHAT!?
HOW!
WHEN!?
H O W!? pic.twitter.com/87h9wjeQPB
Interestingly, the transition reveals The Terminus Decree offers nary guidance for however the Grey Knights should bash this, if they ever person to, and that they mightiness person to chopped done the Adeptus Custodes to bash it. The Custodes are the Emperor’s ace almighty bodyguard — adjacent much almighty than the Space Marines — truthful bully luck with that!
This is simply a immense magnitude for immoderate Warhammer 40,000 lore instrumentality to instrumentality in. It is simply a large revelation, 1 that puts an extremity to years of statement astatine this point. Whether you instrumentality it arsenic the Emperor being astute due to the fact that helium knew that if helium were ever to instrumentality it simply wouldn’t beryllium him but thing other wholly (this improvement would perchance pat into ongoing The Dark King plotline), oregon Games Workshop planting seeds for thing large they’re gathering towards (Chief Custodian Constantin Valdor looms ample implicit the setting, and it does look similar the Emperor is… stirring), the inescapable information is present we know, whether we similar it oregon not.
And that’s a large contented for immoderate Warhammer 40,000 lore fans, who person since expressed their vexation that Games Workshop has explained this enigma astatine all. Warhammer 40,000 is packed afloat of unexplained mysteries, hanging crippled threads, and tantalizing puzzles that it whitethorn ne'er get astir to explaining. Take, for example, the enigma of the II and XI, the Forgotten and the Purged, the 2 mislaid primarchs and their 2 mislaid legions. Games Workshop has danced astir revealing this portion of Warhammer 40,000 lore for years, and galore anticipation the information is ne'er revealed. Speculation is, aft all, portion of the fun. There is overmuch to beryllium said for leaving things to the imagination.
And that was the lawsuit with The Terminus Decree, until now. So what gives? Why uncover it now? Why instrumentality the speculation and imaginativeness distant from fans connected this lore constituent successful particular? There is overmuch vehement absorption from the community. Here’s a snippet:
“I don't truly similar this,” redditor aposi said. “It some spoils the enigma and changes the conception from a limb of past edifice successful a doomsday script (which is chill to speculate about) to conscionable trying to reconstruct the presumption quo successful the lawsuit 1 of those chill speculative things happens.”
There has ne'er been a lawsuit wherever GW filled successful lore that was amended than conscionable leaving it up the the players imagination.
But this is by acold the astir atrocious example. Not adjacent close.
“Dislike... outright annoyed by it,” added Drxero1xero. “Huge mystery, permission it chartless oregon marque a caller oregon 3 retired of it... Nope propulsion it distant successful substance container successful a codex.
“GW are small by small sucking the amusive retired of warhammer's settings, level and colorless... nary mystery, each small bites of lore…”
GW is lost, they're conscionable going to explicate everything and instrumentality the enigma retired of things aren't they?
— Gage Davidson (@GageDavidson608) July 30, 2025“I consciousness similar this not lone wholly undermines the full mystery, but it doesn't adjacent work. At all,” said TheVoidDragon.
“The chill happening astir the lore was not rather knowing what it was, what it would do, oregon what it was adjacent about. The enigma and speculation connected what it could beryllium was what made it intriguing for truthful galore years. To present conscionable outright specify it takes each that mode completely, it's conscionable plainly stated precisely what it is arsenic if it doesn't matter.”
Leaving mysteries is indispensable to the mystique of 40k. If a enigma indispensable beryllium revealed, it indispensable beryllium a magnificent portion of writing. In this case, they marble brained 1 of the astir foreboding and chill things the grey knights had. FFS GW
— LazySternguard (@LazySternguard) July 30, 2025The adjacent evident question is, volition The Terminus Decree travel into effect immoderate clip soon? Will we see, possibly successful a novel, different codex, oregon a blog post, the Grey Knights really combat the Custodes due to the fact that the Emperor has someway revived himself? Or is this conscionable an unusual spike of enactment successful Warhammer 40,000 lore that causes a kerfuffle now, but won’t pb to thing for years to come?
Like the Warp itself, Games Workshop sometimes feels unknowable.
The God-Emperor, by John Blanche. Image credit: Games Workshop.
Wesley is Director, News astatine IGN. Find him connected Twitter astatine @wyp100. You tin scope Wesley astatine [email protected] oregon confidentially astatine [email protected].
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