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Message: <blockquote data-quote="Bohandas" data-source="post: 7901880" data-attributes="member: 7015707">Actually it was Dragonlance (Krynn) where the moons were the source of magicYes (unless a setting has incompatible assumptions about the outer planes, or, to a lesser extent, about the gods. ie. OG 3e Eberron (although I understand that in 5e the distantness of Eberron's gods was retconned to work like in Dark Sun...I think?)) although a special spell is needed to breach the crystal sphere and get out of one setting's star system or into another'sAttempts have been made in this regard. Takhisis (Tiamat) stole the planet Krynn out of its original crystal sphere in order to cut off the influence of the planet's other gods, and Tharizdun (The Elder Elemental Eye) tried to drain all the magical energy of Greyspace. In the end, Krynn's gods located the planet some decades later, and Tharizdun managed to piss off Greyspace's otherwise mellow primary god of magic Boccob (Baccab, Al-Zarad) who banded together with the other gods to banish Tharizdun from the multiverseWithin the context of planescape/spelljammer that's more specifically "all magic within Mystra's sphere of influence depends on the weave"Look up "sympathetic magic" (and also, to a lesser extent, "law of contagion") on wikipediaDivine casters do indeed lose access in spheres where their deity does not hold sway (although I'm not sure offhand if it is lost totally or just partially). They also lose access in outer planes with alignments opposed to their deity's alignment (unless said plane is the main base of their deity's pantheon). The loss of power in alternate crystal spheres is mitigated if their deity's portfolio includes space travel or if  their deity's influence is so widespread that their lack on influence in a particular crystal sphere is a fluke. The problems on opposed planes can be mitigated with a device called a "power key". I don't know if a power key works for foreign crystal spheresWizards have fewer problems, but many crystal spheres have their own idiosyncracies on that end too, such as Realmspace's weave, for example. Additionally, arcane magic has idiosyncracies on all outer planes, and to normalize it a seperate "spell key" is required for each school of magicThe weave is not all magic but merely magic as it functions in areas controlled by Mystra (generally Realmspace but theoretically also in any other place where she holds exclusive sway over magic. I don't recall the setting saying there are any other crystal spheres where she holds such sway, but I also don't recall it saying that there are not any)In any case, she wouldn't control psionics unless psionics-magic transparency is in effect. That rule is explicitly optional.As for the origin of magic, that's ambiguous, although both Vecna (the Flannish god of black magic) and Sharlee the Enchantress (the leader of a massive interplanar wizards' guild known as the Order of the Book) claim that it originates from an overdeity that they describe simply as "the serpent"The impression I've gotten is that it requires a certain critical mass of belief. Its not like Order of the Stick where one guy with some strange ideas about a sockpuppet he made can get said puppet almost accepted into the Norse pantheon. In most official material it usually seems like even organizations like the Believers in the Source, who specialize in manipulating belief to produce real effects, generally need some time and manpower if they want to screw around with the godsUsually their primary dwelling is on an outer plane that either A.) matches their alignment and/or B.) is the primary dwelling place of their entire pantheon.They can remotely exercise power on worlds where they have a foothold from there.Some gods have additional bases of operation in material worlds where they have influence. Krynn's gods of magic, for example, have holdings on the moons that bear their names.An exception to the rule of dwelling on outer planes is that many demigods, especially those who only have influence on a single world, will often dwell on the material plane. The Greyhawk demigod Iuz, for example, directly rules a theocracy on Oreth.They're seperate planes of existence (so not in a crystal sphere as those are part of the material plane). However, unlike normal planes they have finite size. Although finite, the larger demiplanes can nonetheless be extremely large. There are several entire nations on the Demiplane of Dread (a plane which is also known by the toponym Ravenloft, after the capital of its most influential nation)Traditionally most of them are accessed via the ethereal plane, although this is not a hard and fast rule.In some of the earlier editions the Plane of Shadows/Shadowlie was a demiplane, although by 3e it had been retconned into a full plane.Thougn they are not in a specific crystal sphere their limited size and scope means that there are fewer portals to a given demiplane than to a given normal plane and it would not be surprising for all permanent portals to a given demiplane to be in a single cryatal sphere or even a single building (IIRC the ONLY permanent portal to the Island Of The Ape is in Zagyg's castle)</blockquote>

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