A world a little larger than Mars but not as large as Earth that orbits a yellow star along with five wandering stars or planets.
Crucibal has three continents: Sejanna (the main continental mass), Cantabria (the second largest), and Ganat-Pyr which is to the north and east of Sejanna and is more of a large island than a true continent. There is also the Icelands of the southern polar regions, but only one character has ever went there and he never returned.
The world has changed drastically only once and that was when Anthraxx Nasrath used the Staff of Law to recreate the world in his own image, and considering that Anthraxx was not native to Crucibal to begin with, this caused some havoc on New Crucibal which formed soon thereafter in was called The White Flash by those who can remember such things.
Beholders and their kin were banished, as were psionicists and their art.
There was a Second Rebuilding which occurred when Anthraxx’s alter ego, Celeste Nasrath, used the Staff a second time to bring dragons back to the world and to change his gender back to male. This change was more subtle and did not produce the white flash of before. The name of the world remained New Crucibal and was barely noticeable by the populace, but the sacred Staff of Law was no more ever after having used all of its remaining magic to reform the world a second time.
A side effect of the Second Rebuilding was a marble bust of all the Heroes of Crucibal arranged in a semi-circle in the Commons of New Haven around the dais where the Staff once stood.