You can have up to 750 points in your army from either the SoM book or the MA book. Any selection from either of these books will be counted as one of your Rare choices. You may not take a Mythic Artefact or a Pact.I'll add this to the Q&A section.
Monday, February 11, 2013
A question came to me about how many points and how to take monsters from the SoM/MA books. I wrote the following on Facebook: