[PTTG]

Here's a potential for an interesting black swan....

Somewhere several trillion quantum levels "up" from Homeline is a trans-quantum post-human civilization. They wander from worldline to worldline and quantum to quantum freely via omnipresent portals and psibernetic jump devices and integrated mana crystals. Stating the community as a whole is an exercise in futility, even using deity stats -- they can bulk-modify the contents of an entire quantum, and do so as a human might turn on a light switch. Their grasp of cliodynamics and transdimensional science is, as one would expect, unimaginably vaster than Homeline's.

There are a few things close to modern humans in the civilization. Something not unlike tomagachi in purpose exist in ancestor simulations (which verge on being worldlines themselves -- again, their psionotechnomagic makes Homeline-centric concepts difficult to fit around their achievements). In some pocket universes inside of the swirling yet orderly metacosmos, there are even holdouts of old-line humans (and hominids, elves, greys, and others), living in their own worlds that are unimaginably more advanced than our own, yet vastly behind the community around them.

And there is a third kind of humanlike person -- a kind of avatar for some of the mega-minds that inhabit the community.

Their forms are often based on humans, and just as often more fanciful. Nano-Psibernetics grant them incredible powers and reach; integrated mana flow generators empower their magitech. Aside from either of those, advanced biological science creates a being that is superbly healthy and able to support the mind needed to contain even a fraction of the being that endows the avatar with life.

These avatars are exceedingly temporary for their masters -- they rarely persist for more than a few million years before being reintegrated -- and they usually have some almost philosophical purpose. Perhaps to experience, in the truest sense available to a mortal being, the color red. Or perhaps to visit and speak to the inhabitants of some holdout pocket.

One such avatar was flung across the cosmos and landed somewhere near what Homeline would call Q-1500000. It isn't intentionally disruptive, but it is a godlike entity on a quest to walk home across the planes. Its stepping stones are the anchor worldlines (not unlike Homeline and Centrum); sometimes it must travel overland when it reaches one, to make the next jump; sometimes it just uses Warp. Most of the time its visits only last a fraction of a second; a flash of light and a peal of thunder. Other times, it must wait in a given worldline, shaping that world's fate to make the next few steps faster somehow.

The scale of its impacts depend on the GM. Just want to spook people? Then it has no real effect, but theorists are afraid of terrifying consequences. Maybe the real challenge is the fact that it reveals the anchor timelines of the next two Q-levels by accident. Or maybe its Ozmic wake kicks the local mana level up to High for a time.

Want to shake up the campaign? As it leaps off of each anchor world, the world "sinks" in response, either shifting a Q-level or losing its anchor status. Or the avatar decides that it needs to set up shop somewhere in the neutral zone so it can shift that world to something useful for its next great leap... and it's willing to talk. Maybe it carries reality quakes in its wake, causing a wave of micofractures all over Homeline.