Omnishadow

Declare a mythic dominion of shadow tied to a city, eclipse, bloodline, prison, battlefield, forgotten road, dead star, or secret kingdom. Define its principle with the GM: the night that hides a people, the eclipse no sun can break, the shadow that swallows a tyrant’s palace, or the road through darkness that only the chosen can walk. It can be opposed only by Tier 10 shadow magic, divine intervention, or a story condition set when declared.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.