Essence of theInfinity Train

By ingesting this essence, you become entwined with an extra-dimensional space, that is colloquially known as the Infinity Train.

• You gain an extra-dimensional space that shapes itself in accordance with what you wish for it to actually do as well as inspired by your aesthetics. This doesn't give you free reign, but rather acts as a sort of filtering system and impacts what forms it will take. As your space takes on more occupants and acts in accordance with your wishes, it will come more and more under your control. At first, you may decide the general purpose and aesthetic, but soon you may actually customize the rooms as well as the algorithms it uses to select and do what you want. Finally, it may germinate similar extra-dimensional spaces in order to provide different services, once you grow.

• If you wish for it to fix people's problems and like trains, it will become an infinitely-spanning train, with rooms that are bigger on the inside, possibly taking on the size of entire worlds with their own inhabitants. People show up inside the train when they have a problem that they can't solve on their own, with the spaces inside the train being aimed at fixing common psychological problems as well as teach them various skills. As a person stays longer and longer, the spaces become more tailored to them and fate is manipulated in order for them to learn the proper lessons. It may take inspiration from your own morality and ethics, but it may in turn try to teach you a lesson and try to solve your problems.

• If on the other hand, you wish to create an afterlife which takes in souls and tries to solve their unfinished business, provide a haven for them, punish/educate them for misdeeds, train them in order to reincarnate, and more. The first purpose would be accomplished similar to the Infinity Train but with more tangible aspects such as actually solving the murder of someone who died, the second would be simple enough and would be filled more and more as a person grows, the third might take the form of ironic punishment or trying to show them where they went wrong, and the fourth would slowly have souls reincarnate with how well they train being taken into account for how they reincarnate.

• You have limitless possibilities, as long as it is loosely out of your control. This isn't simply for omnipotent power fantasies, but you may simulate worlds that never were or even connect to them through portals. Just fanwank it properly and with reason.