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Oh, right, weren't there some cases of a grey knight at least being temporarily possessed by a daemon? It probably didn't really count as a fall because the grey knight was fighting the daemon from within the whole time.

I guess by "fall" they mean turn to Chaos willingly and sell your soul to it. When the Changeling began his plot (that's still ongoing) to make a grey knight fall in the Daemon codex, it started by engineering a set of circumstances that caused the Grey Knight to doubt his cause, after all.

 1hadhq wrote:

 thenoobbomb wrote:

 d3m01iti0n wrote:
Nope absolutely not. Says right in the codex they cant ally with any army that brings a psyker. Im sure as soon as they see the blue armor they get super heated and talk gak.

Poor Ultramarines.

BT somehow accept there be GK ...maybe they get along if you leave your witches at home...

Well, that's a bit of a headscratcher. There's not a single playable list in the GK codex that doesn't feature psykers. Even if you run Coteaz and take only henchmen, Coteaz himself is a psyker.

So try to figure all this out. How can Black Templars and Grey Knights ally up?

 Wilytank wrote:

 1hadhq wrote:

 thenoobbomb wrote:

 d3m01iti0n wrote:
Nope absolutely not. Says right in the codex they cant ally with any army that brings a psyker. Im sure as soon as they see the blue armor they get super heated and talk gak.

Poor Ultramarines.

BT somehow accept there be GK ...maybe they get along if you leave your witches at home...

Well, that's a bit of a headscratcher. There's not a single playable list in the GK codex that doesn't feature psykers. Even if you run Coteaz and take only henchmen, Coteaz himself is a psyker.

So try to figure all this out. How can Black Templars and Grey Knights ally up?

In the Black Templar Codex it says that they can and will sometimes ally with the Grey Knights despite them being psykers.

They will "tolerate" psykers based on: (1) the Emperor's interests; and (2) absolute necessity.

Thus, BT will use navigators and astropaths because they absolutely have to in order to function.

Similarly, for example, if a hostile army attacked a Terra or some other absolutely core planet, they would fight along side librarian using chapters because the defense of said world in the Emperor's interest would outweigh their hatred of psykers.

Here is a thought, how do BT do anything with GK especially since GK is so secretive only like 3 to 4 chapters know of them. And those chapters are Space Wolves, the GK successor chapter, and the Blood Ravens. They mind wipe everyone else.

Drakka77 wrote:
Here is a thought, how do BT do anything with GK especially since GK is so secretive only like 3 to 4 chapters know of them. And those chapters are Space Wolves, the GK successor chapter, and the Blood Ravens. They mind wipe everyone else.

Well, the simple answer is that you're wrong. They're secretive, sure, but there's more than 4 Chapters that know of them.

In other cases, specific Marines won't be mind-wiped - for instance, the Blood Angels have had their minds wiped of campaigns but Commander Dante himself still knows about it all.

As for Black Templars - you can bet they wouldn't subject to a mind-wipe. Exactly what consequences this would have... I'm not certain. We've not had any say of infighting or civil war with the Grey Knights, so either amicable agreements have been reached or the Templars were mind-wiped against their will...

 Super Ready wrote:
As for Black Templars - you can bet they wouldn't subject to a mind-wipe. Exactly what consequences this would have...

One would imagine they'd react violently, aye. The Inquisition has been trying to find evidence of their true numbers, as they suspect the Chapter of being far overstrength compared to what the Codex Astartes allows. And if you're going to mind-wipe a marine you might as well interrogate him first - he won't remember it, will he? I suspect the BT deal with any necessary secrecy by assigning the marines in question to some far-away and extremely dangerous duty, and the Inquisition goes along since they probably notified the BT about it. The job gets done, secrecy is kept and everyone is happy.

As for the Grey Knights the templars surely know of them - otherwise they couldn't be the only psykers they'll happily fight alongside, could they?

Fluff wise Black Templars will not fight along side psykers. They understand the need for astorpaths and navigators which is why they are tolerated. But fighting on the the field of battle is different. They will not trust anyone who consorts with the Warp even if it is other space marine chapter librarians. The Templars also remove any neophyte that shows any psychic ability as to keep the chapter free of any psykers. What happens to them is unclear but more than likely they may be sent to other Space Marine chapters.

The exception the Templars distrust of psykers is the Grey Knights. This is listed in the BT Codex. As the GKs are the only chapter who have never had a psycher fall to the influences of the warp, the Black Templars will fight along side them. The secrecy of the Grey Knights is new fluff that came out in the 5th edition codex. The Black Templars codex predates that when the Grey Knights were well known and part of the Inquisition codex.

To protect them selves from the influences of the warp and falling to Chaos the Black Templars rely only on their strength of will. This is bolstered by the large number of chaplains in the chapter called Reclusiarchs and Masters of Sanctity. The Templars may also take a Vow at the beginning of a crusade to further increase their defenses against the warp. This translates into the game play Vow "Abhore the Witch" which give Templars a 5+ save when denying the witch and give them a d6" move before scouting towards the closest enemy unit.

Speculah: BT are known for being both fanatically loyal and also no-nonsense, so maybe the Inquisition simply trusts them enough to not divulge the Grey Knights' secret.

They're also friggin' everywhere, what with all that crusadin' they're always doing, which means they probably run into even the rare Grey Knights so often that within the first two millennia, the Inquisition said "Aw screw it" and just let the Black Templars know about the Grey Knights. So whenever the BT run into them (and they will, because BT are friggin' everywhere), they know in advance that Grey Knights can be trusted despite being psykers and thus will work with them (which is good for the Grey Knights).

TiamatRoar wrote:
Speculah: BT are known for being both fanatically loyal and also no-nonsense, so maybe the Inquisition simply trusts them enough to not divulge the Grey Knights' secret.

They're also friggin' everywhere, what with all that crusadin' they're always doing, which means they probably run into even the rare Grey Knights so often that within the first two millennia, the Inquisition said "Aw screw it" and just let the Black Templars know about the Grey Knights. So whenever the BT run into them (and they will, because BT are friggin' everywhere), they know in advance that Grey Knights can be trusted despite being psykers and thus will work with them (which is good for the Grey Knights).

In the fluff, there are some in the Inquisition who are worried about the Black Templar numbers. While no one has any evidence on the Templars true numbers except for the High Marshal, it is estimated that there may be as many as 6000 or more. The reason that no one has really pried into this is that the Black Templars are spread very thin across the Imperium and no Black Templar Crusade has ever fallen to Chaos. This is all stated in the current BT Codex.

I grant certain other individuals might know of grey knights but as chapters only those I've listed so far do I know of knowing their existence. Also it's in a piece of space wolves fluff of this because the space wolves fought the inquisition over this.

The Inquisition has been trying to find evidence of their true numbers, as they suspect the Chapter of being far overstrength compared to what the Codex Astartes allows.

the black Templars don't actually follow the codex they were just "like screw the codex were black templars"