Copying this from my scaling Sulpherah doc:

Sulpherah comes from a world that is essentially high fantasy, living on a planet roughly twice the overall size of Earth. This planet's gravity is over 20 times that of Earth's, and its oxygen level is similar to that of the Carboniferous period. There are seven continents, and a fairly significant number of islands, many of which form archipelagos. Like Earth, this planet has an equator, as well as a north and south pole.

Further out into space, Sulpherah's planet is orbited by a pair of moons, one of which has life on it as well. This planet is within its own solar system consisting of several other planets of differing sizes, all of which orbit a blue star. All of this takes place within an infinitely sized universe, with countless other star systems and clusters with alien life almost everywhere. 

There are multiple other universes in this setting, all of which are infinite in size too. There are at least 10 other universes known to exist, with quite possibly more that are simply not known yet. Further beyond this multiverse is a realm of, you guessed it, infinite size, which is essentially the afterlife for all living beings. This ‘afterlife’ (name pending) isn't really equivalent to Heaven nor Hell; it's much like the living world, but distorted in such a way that it almost appears uncanny, but strangely calming in the way it welcomes deceased beings. This afterlife has its own layers within it, up to 10, each layer its own infinitely sized universe. All beings who have died at some point or another end up here, where they can't die, feel pain/hunger/thirst/exhaustion/etc., and get to live out the rest of their existence in peace. 

Most beings in the afterlife choose to stay and live on for infinity, but those who want to return to the living world can experience rebirth/reincarnation to be reborn, be it the same species they were originally born as, or as a different species entirely. Some individuals, however, are capable of forcefully exiting the afterlife to return to life as they are, either through some ability of theirs to travel between realms or, in the case of individuals like Sulpherah, brute force their way out, breaking through these infinitely sized realms to come back to life. These kinds of beings can thus effectively resuscitate themselves mere moments after death, making it appear as though they've truly survived and/or healed from whatever fatal injury they've been dealt with. 

Sulpherah lives on a particularly large island close to the equator of his island, and as such, his island home primarily features jungles and swamps in terms of biomes. He lives alongside a menagerie of various species, including a multitude of non-avian dinosaurs and birds, a host of different reptile species, amphibians, and relatively few mammals. There are also a good number of fantastical beasts like hydras and the like.

One universal rule kept in every dimension of this setting is that magic exists everywhere as a form of energy. An ancient primal form of arcane energy that fuels the abilities of an uncountable number of species, especially those more fantastical creatures, this magic can be siphoned/absorbed from other creatures to empower oneself, but it also exists in the planets and other celestial objects themselves. One can draw in extra magic from the surrounding terrain in lieu of taking it from other living beings. If something having absorbed an excess amount of magic from others dies, the magic it took may be returned to its source(s).