The Journey to Prismata is about the dangerous journey across space and through a sentient black hole to reach Prismata ~ an infinite sanctuary in a pocket outside spacetime that holds all Gods and Goddesses, their realms, and the faithful citizens who inhabit them in a multidimensional omnist version of heaven.

The sentient black hole, which is referred to as Carl, guards Prismata from all violent, hateful, or malevolent forces who wish harm or exploitation on life inside Prismata, which is a lot in the multiverse. The only way to get to Prismata is to traverse Carl; no known outside magic or technology can get around its awesome power.

To test those wishing to enter Prismata, Carl puts them through a series of trials in pocket realities he has created or consumed. There is no real rhyme or reason to his trials; everyone has to endure them, even those who rule in Prismata are subject to them when they leave and need to return. This is for the safety of all to avoid any deceptions or trickery to enter Prismata. Those who do not pass its trials and it deems ultimately irredeemable, it consumes, obliterates, and recycles back into the cosmos. These trials incorporate quantum phenomena inspired by global myths: for instance, a "Schrödinger's Labyrinth" where paths exist in superposition, drawing from Hindu illusions of Mayan dreamtime realms, forcing travelers to confront alternate selves and resolve paradoxes of identity before proceeding.

In these pocket realities and dimensions are all sorts of different civilizations, humanoids, and creatures that have taken up residence in Carl. These exist due to a variety of factors that we understand and don't understand either:

Carl created them from matter it consumed for fun or to act as trials;
They were being consumed by Carl and instead of destruction Carl decided to spare them for various known or unknown reasons;
It is even known some have sought protection with Carl inside it from the violent forces of the universe but not wishing to endure the trials to enter Prismata, wishing to build their own reality;
Those who have sort of failed the trials of Prismata but aren't malevolent and are in a form of Limbo until they either ultimately pass the trials, give up, or fail.

Some inhabitants know they are inside a black hole; others do not. Some are able to travel between the different pockets in Carl but have not passed enough trials to enter Prismata itself. Void walkers and void animals are terrifying and mysterious extradimensional beings that are natural inhabitants to Carl and can be found in all realms and dimensions. Void walkers serve as shape-shifting guardians with seiðr-like magic (nodding to Freyja), who protect and serve to test moral ambiguity by manifesting as all sorts of things from monsters to lost loved ones; void animals, meanwhile, act as symbiotic companions that feed on unresolved emotions, helping or hindering based on the traveler's growth like from Greek Hades' Cerberus or Egyptian Ammit's devouring judgment.

Among the limbo dwellers are nomadic "Echo Clans" who form temporary alliances across pockets, trading lore snippets from consumed worlds; they include beings spared from cosmic cataclysms, like survivors of a devoured star system or genocidal tyrants, who maintain oral histories drawing from African Yoruba orisha tales with sci-fi entropy concepts.

Prismata itself gets its name from the Prism Heartstone that created it. The Prism Heartstone—as its name suggests—is a prism at the heart of Prismata that through the collective energy, faith, and other quantum juju of its inhabitants shields Prismata from any outside harm, even from Carl itself. The Heartstone is the only known object in the universe that Carl seemingly has no power over, which means it could be used to hurt it theoretically, so this is fundamentally why Carl defends Prismata. The Heartstone emits "Resonance Waves," periodic pulses that amplify inhabitants' collective faith, temporarily syncing Prismata's realms with Carl and external universes for visions or intervention, ie quantum entanglement forming itself as divine communication.

As with many of the mysteries of Prismata, it is unclear if Carl existed first, or the Heartstone, or the Heartstone is part of Carl, or the Heartstone created Carl, but what is known is that Carl defends Prismata, and the inhabitants defend Carl while helping guide those seeking Prismata's refuge from whatever violence or entropy in their universe.

The Journey through Prismata and its trials are heavily inspired by human (and interdimensional) mythology, or it should be said human (and interdimensional) mythology has been heavily inspired by these trials. Due to its quantum nature, sometimes people encounter Carl or its inhabitants but don't understand fully what was happening, but the legends persist in myth, rituals, songs, lore, stories, or even dreams. Stories of trials in the afterlife, or the various deities' dramas, all become echoes through time and space holding grains of truth. From all these lores and dimensions, one intersection of guidance emerges as the path through Carl's Void chaos and that is to follow the interdimensional river that flows through all the realms to Prismata: The Veil Current.

Inhabitants of Prismata itself who have passed the trials to be considered citizens value life, justice, beauty, grace, and all the other finer things in the universe. They also have a deep sense of responsibility to the cosmos; while some will periodically fall into escapism to cope, all inhabitants eventually feel the call to leave Prismata to help within Carl, the outside dimensions, and life in various ways, especially to go back to where they originated from or to help those faithful to them, their legends, and lore. Inhabitants are as diverse as there are stars in the sky with varying powers, abilities, or skills. The social structure of Prismata is complex; while mostly egalitarian, there are pockets of all different types of governance structures and cultures that all coexist peacefully (otherwise they are kicked out to Carl) and have found ways to coexist for eons.

Anyone can leave Prismata at any time; there are interdimensional transports, artifacts, etc., that work as exits, and people come and go all the time, but as stated, no magic, tech, or known thing can re-enter Prismata without first going through Carl. Among these exits are "Echo Portals" that act as artifacts that imprint a traveler's essence, allowing Carl to recognize frequent visitors for abbreviated trials, think Celtic otherworld gateways or Japanese Shinto kami bridges. The further the Echo Portal needs to go in time/space, the higher the risk of quantum "fade" if overused or used improperly, eroding the portals connection to their origin realm, so are used mindfully and sparingly compared to relatively slower means of interdimensional travel.

However with that said, certain entities Carl lets pretty much traverse freely back and forth—like Freyja, Anubis, Hades, and other Gods and Goddesses of the underworld or afterlifes—due to their incredible powers that make them almost impossible to hurt, kidnap, or defeat and unquestionable character that has built trust over eons.

Even with all that power and trust, Carl and the Prism Heartstone's combined powers have a final gateway before entering Prismata no one can circumnavigate. This trial is called "Walking the Ice," where before entering Prismata's door one needs to walk a bridge of razor-thin ice over the infinite void only able to see themselves and their heart reflected back to them in the ice. If who is walking the ice's heart is heavy with hate, fear, guilt, shame, or malevolence in any manner, the ice will crack, and they will fall to their final death and be recycled back into the cosmos. If they are true of heart, the ice doesn't crack, they pass, and can enter Prismata.

Most entities in the multiverse would fail this final trial, which is why the Journey, to help prepare a person's heart for this ultimate test. Do you dare step into Carl's chaos, where myths twist into quantum knots and only the unyielding heart endures?