*Spoilers*Preparing to run the AP, here are some (maybe) errors I noticed.

[Brandon Tomlinson]

• The Tatzlwyrm, It should have +16 in snow to stealth. Based on it's fluff text it waits in snow for creatures to wander past, that implies it's been waiting a while (over 2 minutes). Either the stealth dc of 26 was calculated with a take 10, or it was calculated only using the snow terrain +6 modifier. also it would only be 26 if you were within 10 feet.

• Vrixx. His reason for not telling more doesn't make sense to me.
  
  pg.23:

  He refuses to tell the PCs more, knowing full well the White Witches will pierce his heart with a sliver of ice if he talks.

  I thought winter-touched fey already did that
  

  pg.72:

  Willingly pledging themselves to a
  wholly evil life, these creatures undergo a complex ritual
  called the Winter Rite, in which they accept a sliver of ice
  into their hearts that infuses their bodies with the same
  supernatural winter perpetuated by the White Witches of
  Irrisen.
  
  

I'll add more as I do more in depth preparation.

[Joshua Woodard 612]

I Think it means they can use the sliver of ice to kill him... not sure though.

[Robert G. McCreary]

Brandon Tomlinson wrote:

• The Tatzlwyrm, It should have +16 in snow to stealth. Based on it's fluff text it waits in snow for creatures to wander past, that implies it's been waiting a while (over 2 minutes). Either the stealth dc of 26 was calculated with a take 10, or it was calculated only using the snow terrain +6 modifier. also it would only be 26 if you were within 10 feet.

• Vrixx. His reason for not telling more doesn't make sense to me.
  ** spoiler omitted **

  I thought winter-touched fey already did that
  ** spoiler omitted **
  

I'll add more as I do more in depth preparation.

The tatzlwyrm is assumed to be talking 10 on its Stealth check. Of course, a GM can always roll the Stealth check, but then we couldn't list the DC in the description. :)

As for Vrixx,

Spoiler:

winter-touched fey do willingly accept a sliver of ice into their hearts (thus gaining the template), but it comes at a cost - if they turn against the White Witches, the witches can use the ice to kill them. This is explained in the last sentence of the winter-touched fey description on page 72.

[Brandon Tomlinson]

Ah hah! I figured I was just missing a sentence. Thanks for pointing that out!

[spectrevk]

If he's in the snow for 2 minutes prior, couldn't he have taken 20?

[Robert G. McCreary]

spectrevk wrote:

If he's in the snow for 2 minutes prior, couldn't he have taken 20?

You can't take 20 on a Stealth check because there is a "penalty" if you fail; i.e., someone sees you. Again, in adventures, we assume an "average" check, equivalent to a take 10, which gives us a number for the DC of opposed Perception checks.