The Mao Ceremony (Ongoing)
At the end of Gather Power, after Power has been added (i.e., before Determine First Player), you may choose to sacrifice 1 or more of your own Cultists, adding 1 Power apiece to your total.
Any: Mother Hydra Combo - Any faction can combo this with Mother Hydra for awesome effect. Use Zygote to replenish your entire cultist supply for only 1 power.
Black Goat: Sacrifice all your cultists for a 6 power gain. Then use that power for up to 3 Groth actions. If you fail, you will gain back your cultists "for free".
Wind Walker: Cash in your cultists in the (assumed) final doom phase for a boost in power. This frees them up to be placed via Cannibalism for free, in the wake of your destruction.
Yellow Sign: If nobody is taking the Passion bait, use this spellbook to re-position your cultists on desecration markers.