An Endbeing (short for N-dimensional being) is a sapient (except in 2D, under intense debate for 3D) creature that inhabits all universes in The Stack except for E0 and E1 where no life can exist.

Common characteristics

Endbeings don't look very alike, even in the same topology. This is because of their intense sensitivity to radiation which can cause their appearances to spontaneously, drastically, and irreversibly rearrange. An individual appearance is known as a "form", and most Endbeings have the ability to generate their own radiation to manually switch forms. While forms can be almost anything in theory, they almost always fit into one of a few archetypes:

Reformation

When an Endbeing reforms, their personality and intelligence always stays intact, and their voice tonality is likely (but not guaranteed) to be similar. However, their exact voice will vary a lot since they'll have a completely different arrangement of mouthparts, thus having a completely different set of pronouncable phonemes. Thus, most Endbeing languages have a feature where phonemes are determined by the closest sound to what was actually pronounced, as opposed to human languages where it's more exact. Also, for whatever reason, most Endbeing languages have genetic phonemes, pronounced by manually switching forms, thus having a conversation will often involve swapping rapidly between forms and looking completely different at the end. This has become a bit cumbersome, so there's an increasing movement to substitute these with something else, such as crossing any two appendages or pronouncing something close to the French R sound.

Due to the constant reforms, Endbeings don't typically die of old age or physical injury, but they aren't invulnerable and can die in various ways, most of them equivalent to causes of death on Earth.

In later revisions of the lore, endbeings can no longer generate their own radiation, and don't use reformation as a phoneme in language. The lore gets way too complicated to design otherwise, as every character with a specific appearance needs to have some reason they aren't doing it.

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Trivia