The Azathoth Expansion is not a playable Faction. Instead, it has Neutral Units and Spellbooks that are available to any player. Players may individually access Azathoth itself, as well as its Monsters and Spellbooks. One player may earn one Neutral Spellbook, while another player might earn a different one. These Spellbooks are mix-and-match. Similarly, two players may each Control a different type of Monster.
Azathoth is an Independent Great Old One, and as such is governed by the same basic rules for all Independent Great Old Ones.
The 4 Neutral Monsters in the Azathoth expansion are governed by the same basic rules for all Neutral Monsters.
These Spellbooks are unique gameplay items. When you fulfill one of your Faction’s Spellbook requirements, you may take an Azathoth Spellbook instead of a Faction Spellbook from your Pool.
Once you take a Neutral Spellbook, it is yours; no one else can earn it. You retain that Spellbook throughout the game (exception: Recriminations). This means that you will NOT have access to one of your Faction Spellbooks in this game, so choose wisely.
A Neutral Spellbook counts as one of the 6 Spellbooks needed on your Faction Card to allow you to perform Unlimited Battle and win the game, as well as counting for any other rules or abilities that reference your Faction Card’s Spellbooks (such as Nyarlathotep’s Combat rating or the Moonbeasts’ ability).
Black Goat Awakens Shub-Niggurath for the first time, which fulfills one of her Spellbook requirements. Instead of taking one of her own Spellbooks, she selects a Neutral Spellbook (in this case, The Mao Ceremony).
Azathoth’s own Spellbook, Nuclear Chaos, is NOT a Neutral Spellbook—it can only be placed on Azathoth’s Loyalty Card by the player who Controls Azathoth. It can never be placed on a player’s Faction Card.