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So, when attempting to manifest a psychic the rules state on a roll of double 1 or double 6 you suffer perils of the warp. Tie that in with the brotherhood of psykers ability ‘giving plus 1 to psychic tests), would that negate the perils? So a double 1 would become 3? Avoiding the perils, or do the perils take effect regardless of the modified number?

Basically do the rules target the actually dice role of double 1 and double 6? Or would they target the number 2 and 12 so with the plus one modification the grey knights wouldn’t suffer perils? Feel like I’ve answered my own question but would still like other people’s opinions/input.

Thank you!

You've still rolled a double 1 or a double 6, regardless of the modifiers, so even with modifiers you trigger perils of the warp.

Perils of the Warp doesn't care what final result you rolled, only if you rolled a double 1 or double 6. You could roll a double 1 with +30 to the test and you will still Perils. This is why the Weirdboyz has a special rule causing him to Peril on a 12+, because modifiers normally do not affect Perils.

Not to mention that IF it triggered on a modified roll of 2 or 12 (which it doesn't), that wouldn't even reduce its odds of triggering, since a natural 11 (which would in this case be modified to a 12) has the same odds as the combined odds of a natural 2 or 12.

Maethbalnane wrote:
Not to mention that IF it triggered on a modified roll of 2 or 12 (which it doesn't), that wouldn't even reduce its odds of triggering, since a natural 11 (which would in this case be modified to a 12) has the same odds as the combined odds of a natural 2 or 12.

Except in this hypothetical instance it would since a 12 + 1 is a 13 which would not be a 12. In your instance, only a natural 11 could peril as double 1 would be modified to 3.

 mokoshkana wrote:

Maethbalnane wrote:
Not to mention that IF it triggered on a modified roll of 2 or 12 (which it doesn't), that wouldn't even reduce its odds of triggering, since a natural 11 (which would in this case be modified to a 12) has the same odds as the combined odds of a natural 2 or 12.

Except in this hypothetical instance it would since a 12 + 1 is a 13 which would not be a 12. In your instance, only a natural 11 could peril as double 1 would be modified to 3.

He's right though as far as it goes, as there's 2 results out of 36 you can roll to get a natural 11 (5 on the first die, 6 on the second, or reverse the dice that get those numbers), compared to 1 result getting a natural 2 + 1 result that gets a natural 12, for a total of 2 results out of 36, just like the natural 11 if it was a modified 12 (not a 12+).

Where the thought falls apart though is that if the modifier's greater than a +1, then there's a greater chance of perils if you do it on a modified 12. There's 3 ways out of 36 of rolling a natural 10 compared to 2 for the natural 2 and the natural 12, so you'd have a 50% greater chance of gettting perils there than with the way it actually is.

Since it doesn't work that way and it's only natural rolls of 2 and 12, though, this point's moot.

 doctortom wrote:

 mokoshkana wrote:

Maethbalnane wrote:
Not to mention that IF it triggered on a modified roll of 2 or 12 (which it doesn't), that wouldn't even reduce its odds of triggering, since a natural 11 (which would in this case be modified to a 12) has the same odds as the combined odds of a natural 2 or 12.

Except in this hypothetical instance it would since a 12 + 1 is a 13 which would not be a 12. In your instance, only a natural 11 could peril as double 1 would be modified to 3.

He's right though as far as it goes, as there's 2 results out of 36 you can roll to get a natural 11 (5 on the first die, 6 on the second, or reverse the dice that get those numbers), compared to 1 result getting a natural 2 + 1 result that gets a natural 12, for a total of 2 results out of 36, just like the natural 11 if it was a modified 12 (not a 12+).

Where the thought falls apart though is that if the modifier's greater than a +1, then there's a greater chance of perils if you do it on a modified 12. There's 3 ways out of 36 of rolling a natural 10 compared to 2 for the natural 2 and the natural 12, so you'd have a 50% greater chance of gettting perils there than with the way it actually is.

Since it doesn't work that way and it's only natural rolls of 2 and 12, though, this point's moot.

The fact that larger modifiers are actually worse strengthens the argument I presented (that the imagined rule "wouldn't reduce the odds"). A far cry from "the thought falling apart".