This RP thread is open to anyone, with some stipulation: the astral plane is only accessible to those possessing psychic or mystical abilities (telepaths, arcanists, gods, etc.). There are some exceptions to the rule; anyone can be brought here by an astral “guide” who has the requisite abilities, and it is possible that characters of sufficient scientific acumen could devise some technological means of arrival (perhaps not even on purpose).
The astral plane is a non-physical plane that overlaps the material plane (what most recognize as “reality”). It is a realm of thoughts, dreams, and visions. The landscape (if it can be called such) is unstable and surreal, though a sufficiently strong will can shape it. This can lead to interesting battles in which two powerful minds attempt to shape their surroundings, creating a sort of environmental war.
The most basic rule on the astral plane is that “thoughts are things.” A strong mind can create practically anything: will yourself to be holding a sword, and it shall appear in your hand. A character that is weak and sickly on the physical plane may appear strong and healthy on the astral; one’s appearance is determined by one’s mind, although such forms generally resemble their material forms in some way.
A character’s astral form is constantly connected to their material body by a thin, nearly invisible silver cord. Should their astral form be “killed,” this cord will yank them back into their biological body, unharmed, but suffering effects similar to a severe hangover. Such individuals will need a recovery period (varies according to their mental fortitude) before returning to the astral plane. Though it is borderline impossible, this silver cord can be severed, breaking the connection between a character’s mind and body. The body will fall into a comatose state, and may very well die, if it is not attended to appropriately. The mind will become trapped on the astral plane, and will likely require aid in returning to the body.
In short, the astral plane is a playing field where those with the right abilities can exercise tremendous creativity and wield vast power, but be warned: the plane has its share of both guardians and predators, and the character who causes too much upheaval or draws too much attention will likely encounter them…