I've encountered a couple of monsters with "Magical Resistance" on their token backs, listed right under the line where their damage output from strength tests in combat encounters is listed. (Child of the Goat, Crawling Chaos...perhaps others have it.)

I can't seem to find anywhere in the rules how to apply this. Obviously I'm missing something major.

I know how it works in Arkham Horror (where Magical Resistance halves the damage from a combat spell or magical weapon, and Magical Immunity means you can't even use those against that target). Guess I'll play it that way, but it seems strange that it's not in the rules, unless it is and I just can't find it.....

Anyone know about this? Thanks!

See the Mountains of Madness Rules Insert, page 6:

Thank you for the reply! I suppose that means that Agnes Baker cannot use her Intervene spell (Incantation - Teamwork) to give Jim Culver +3 strength for his combat encounter against the Crawling Chaos. I'm going to assume that she can't, since it's a spell, even though it's not being applied DIRECTLY to the monster itself.

No she can't. If it adds bonus dice to the combat and is a magical source, it can't be used. This includes "magical" assets/allies. Anything without the "magical" keyword or that is not a spell is considered a physical source when referring to resistances.

However, spells such as Shriveling, Poison Mist, Banishment, and Storm of Spirits can be used with no problems since they do not add bonus dice to a combat roll. Agnes can also use her passive ability to enhance these spells as it adds "additional dice" and is not a "lore bonus."

Turns out it wasn't needed anyway. Culver used Kerosene on it. Between the +5 from Kerosene, his own strength and secondary ability (plus being blessed), minus the modifier, the 8 dice rolled all hit (don't think I've rolled that one before).

The Crawling Chaos was utterly incinerated within less than five seconds. Almost sad in a way.

And I won, against Ithaqua!

Thank you for the very helpful clarification!

No worries.

The only time I've had to take down the Crawling Chaos, it was Agnes with 2 lore improvements casting Storm of Spirits with her passive used to buff it.

That's the only reason why I know so many specifics regarding magical resistance, haha. I went to the source for clarification, and Nikki was very helpful.

It was a little scary that someone would have such a mastery of all that detail at their immediate command. Good timing because the information was nice to have.