Dreams


 * Having this spellbook (or the prospect of Cthulhu obtaining this spellbook) creates forced behaviors by your opponents. The will be reluctant to leave a single cultist in an area with a gate even if you never take the action.
 * While the power cost for this spellbook action is high (3 power), the addition of your cultist to an area where they can potentially control a gate while simultaneously removing your enemy's cultist and controlled gate is a big power swing.