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copy pasted from the Grey Knights FAQ:
Psychic Powers
A Grey Knights Librarian may use the psychic disciplines found
in the Warhammer 40,000 rulebook, instead of those in Codex:
Grey Knights. If he does so, generate a number of psychic
powers equal to his Mastery Level from the Divination,
Pyromancy or Telekinesis disciplines (in any combination)
before armies are deployed. If he does so he may not purchase
additional powers. Hammerhand cannot be exchanged in this
manner.
An Inquisitor with Mastery Level 1 can exchange his psychic
power for a single roll on either the Divination, Pyromancy or
Telekinesis disciplines. Coteaz can generate two powers from
either the Divination, Pyromancy or Telekinesis disciplines (in
any combination) in place of those listed on his profile.

From what i read here only inquisitors and Librarian can use the BRB psychic powers and Draigo and the rest can only use powers from the codex:Grey Knights.

The discussion is that it does not say they can't, but only mentions Librarian specially because he can't swap out hammerhand, and the inquisitor is mentioned for mastery 1 and coteaz for mastery 2.

How do you guys interpret this? Only Inquisitors and Librarian or all with mastery 1-2 and follow examples from faq.

It's pretty clear to be honest.

Only Librarians and Inquisitors with psychic mastery may swap their book powers for rulebook powers (up to their mastery level).

None of the other characters, vehicles or squads may do so.

its pretty clear yeah, but i can see why they read it like they do aswell.
Librarian is mentioned because he can roll as many as he has warp charges, and can pick from any of the 3 GK has access to, but must keep Hammerhand.
Standard Inquisitor with mastery 1 can only roll for one from any of the 3
Coteaz with Mastery 2 can roll for 2 powers, but is limited to 2 from same school (divination, pyromancy and Telekinesis)

So they mean that not being mentioned they can treat the rest like Inquisitors because they have mastery 1 or 2 and are IC.

Edit: not like that will make paladins with Draigo any more OP with reroll to hit from Prescience, right? hehe

Aandiin wrote:
Coteaz with Mastery 2 can roll for 2 powers, but is limited to 2 from same school (divination, pyromancy and Telekinesis)

He is not limited to same school.

Remember the librarian chooses which powers to take from a list of spells he buy's. So if you buy 3 powers from codex grey knights and one of them is hammer hand you cannot switch out any powers. Since they are all the same cost grab 3 basic and swap out.

Lungpickle wrote:
So if you buy 3 powers from codex grey knights and one of them is hammer hand you cannot switch out any powers.

Not true. You just can't switch out hammerhand.

What confuses me is the Librarian, which is really weirdly worded.

Let's throw the inquisitors away, because that part is pretty obvious.

Psychic Powers
A Grey Knights Librarian may use the psychic disciplines found in the Warhammer 40,000 rulebook, instead of those in Codex: Grey Knights. If he does so, generate a number of psychic powers equal to his Mastery Level from the Divination, Pyromancy or Telekinesis disciplines (in any combination) before armies are deployed.

Ok, so far so good, I have mastery level 2 Lib, so I'll get, reading that text, 2 spells. Cool.

If he does so he may not purchase additional powers.

That's cool, so I'm not allowed to buy any of the 5 point powers in Codex:GK. Ok, I'm with you so far. Check.

Hammerhand cannot be exchanged in this manner.

Wait what? So did you just take back what you said a few lines ago? So since the Lib ALWAYS has Hammerhand, that means that he cannot at all generate an amount equal to his mastery level from those disciplines. He can in fact only generate his mastery level minus one?

Am I the only one that finds those two explanations of the same thing contradictory?

The last line also mentions "exchanging in this manner".
We haven't been exchanging anything. We've not bought any skills from Codex:GK and have instead selected them from the BRB. But we haven't first bought spells and then exchanged them.

That line seems to imply that they had some other rule there first that you had to buy skills and then replace them with those from the BRB, and then they forgot to amend the last line when they changed that.

I've tended to treat that as the librarian getting to keep hammerhand 'and' the 2 psychic powers he rolled. 'or' getting to keep hammerhand 'and' any of the other powers that have been purchased from the codex.

Either way they're keeping hammerhand, it's just a matter of what 'other' powers he or she has.

The problem is you buy the codex powers when building the list but don't roll (if you are going to) until the start of the game.

They mention not being able to exchange HH for just that reason, so you know there is no way to get rid of it. You will always know it. It and either any number of powers you purchase from C:GK, or a number equal to his PML from the rule book.

You are right, the timing is screwy.

When I build my Nid list, I can decide right before deployment if I want to swap out codex powers for BRB powers.

It seems like GK Libs have to make that decision (to an extent) when building their list.

Meaning, if you buy any power, you can't get BRB powers.


In My World: I would let the GK Lib swap out all of his powers, sans Hammerhand, for 2 BRB powers. So you can buy extra powers, but they are 'wasted' if you swap them out.