Devolve


 * Using this spellbook puts a cultist back in your pool to be resummoned later somewhere else.
 * As long as a Deep One is on your pool, your cultists are virtually immune to capture. Simply Devolve a threatened cultist the moment the enemy moves into the area.
 * Cultists can Devolve in response to a battle initiated in the same area to add additional combat dice to your offense or defense.