How do you acquire a Scroll of Magnus after the game has begun? I thought they were purchased as an Upgrade When you designed the army, and then you rolled for the psychic power when all the others were being rolled - at the start of the game?
I would not allow the upgrade, unless all you had was a Tzeentch herald, and then in a friendly game, I would let you use the Primaris power (level 1 psyker).
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The Scroll of Magnus allows you to generate new powers during the game mate.
You buy it as part of your army but use it during the game at the start of each turn.
The generation of a psychic power by a model that has Mastery Level 1 included in its profile is NOT an upgrade, it is something included in his profile/stats/standard loadout. So if the lucky Warp Storm roll is obtained and successful in generating the Herald, and the Daemons player chooses a Herald of Tzeentch, they Herald rolls on either Divination or Tzeentch tables for 1 power. Mastery 1 means the psyker must have 1 power.
But where are we told to roll for a power? Where are we told a Mastery 1 psyker has to have a power?
When you hear hoof-beats, it's best to think horses not zebras.
BRB, Page 66: "Unless otherwise stated, a Psyker knows a number of psychic powers equal to its' Mastery Level."
BRB, Page 142: "Before either player deploys their army, you must generate psychic powers for your Psykers."
I think, under the strictest reading, the HoT doesn't get a power, with the 'you must' clause on 142 being an 'otherwise stated' type of condition for 66. However, I could possibly see rolling a power at the start for the as-yet nonexistent Herald, with the caveat that since you rolled for it, you've effectively already chosen your Herald, and so the first 11 you roll *must* spawn that HoT with the chosen power.
Last edited by DWest; 06-25-2013 at 01:01 AM. Reason: Edited for clarity
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I think a far simpler method is to realise that as the Herald doesn't exist before deployment of both armies you can simply roll for his power prior to his deployment.
But now you just made a rule to facilitate the resolution of another vague rule.
I still believe the simplest solution that has the least impact is that the Herald player will randomly roll for a discipline and get the primarus power of that discipline.
As far as the quoted pages…both have qualifiers. “Unless otherwise stated…” and “Before either player deploys…” both limit the following rules. The lack of “Do X for a created HoT” can be seen as a statement that nothing happens when it’s created. “Before deployment” easily limits the “must” of the rule.
When you hear hoof-beats, it's best to think horses not zebras.
If it wasn't for the scroll of magus I can see not being able to roll for abilities. Due to the scroll it shows you can still generate powers outside of deployment.
The problem here is you are a master 1 psyker, so you must have a power. Any start of movement phase powers is debateable if you can use them or not, but shooting phase powers can be used after deepstrike.
But the Scroll is a specific item that allows you to generate powers outside of the normal rules. While it does show there is a instance of exception to the rules, it does not prove you can just generate powers whenever we feel like, some has to tell us to generate powers outside to the norm. As far as I can tell, the warp storm rules do not do this.
When you hear hoof-beats, it's best to think horses not zebras.