When unrelenting evil comes pouring over the land, the light of the angel made flesh can push them back. The party is saved as the Johnson and his goons come storming in, taking out the go-gangers. The General listens and the nuclear option is diverted, so better special forces may move in on the alien invaders. Great power sometimes finds itself an ally instead of an enemy to protagonists, but such power sometimes offers a heaven bound level of vision and small details can be lost. Overconfidence and sure, the Omni-Potent Fallacy uses their abilities like clubs to solve problems, and in many ways creates waves that break open more rifts.
This NPC is a wild card. Pointed the right way and they assume they can solve the world’s problems in an instant, but without regard to cost and loss. Their assumption on being right can put them at odds to players who haven’t earned their trust, and keeping them calm, happy, and loyal is a juggling act. Such power isn’t something a player wants to content with, whether it comes from a great Wizard, a dragon, a CEO, powerful AI, or even a god. Once they’ve assumed the players are enemies, it’ll be hard to convince them otherwise without equal force.
The Omni-Potent Fallacy exists in most genres, often in the role as a figurative or literal Deus Ex Machina. Gods and Demons in Fantasy realms attempting to understand mortal risks and solving issues with lightning. CEOs and Spy Masters trying to keep their finger on the pulse of an ever deepening world. Military leaders sure of their place on a battlefield. The NPC need not have physical unlimited powers but merely the ability to command such power even through chains of minions.
The worst position a player can find themselves is on the other side of the Omni-Potent Fallacy finding out their wrong after they’ve acted. After they’ve killed loved ones, destroyed cities, ended the lives of innocents and guilty alike. These acts can send the figure spiraling in several hostile directions. They may become self-reflective and depressed, turning inward and losing their great power. They may lash out and blame others for being fooled. Or Worse, they can assume the loss and misdirected actions as proof of their conviction and dive deeper into dangerous beliefs. At this point, the players can try to guide them back to the true path and solve the problems their misdirection has caused, or seek to destroy the omni-potent figure and dismantle them before they can do further harm.