How to Awaken Daoloth (Cost 6):
1) Your controlled Gate is in an Area with your Great Old One.
2) Pay 6 Power, and place Daoloth in the Area containing the Gate.
Cosmic Unity (Pre-Battle): In a Battle involving Daoloth, choose one enemy Great Old One. It rolls no Combat dice (it still gets its Battle Ability, if any).
Spellbook Requirement Edit
A Great Old One is Killed (anywhere on the map).
When Daoloth enters an Area without a Gate, immediately place a Gate there.
Cthulhu: It will be easier to trigger Daoloth's spellbook requirement, as you can recklessly attack with Cthulhu until he dies to trigger the spellbook and reawaken him for elder signs.
Opener of the Way: It will be easier to achieve its spellbook requirements with the needed plethora of gates on the board, as Daoloth will be placing gates wherever he moves.