By means of this powerful magic, the spellcaster can open a portal to another dimension or plane. The portal appears as a disk up to 10 feet in radius, on the far side of which is the other dimension or plane,
The worldwalk portal can be cast up to 30 yards away and can be oriented either vertically or horizontally. One side shows the opening into the other plane, while the other is a smooth, gray disk. A portal cannot be cast into an area already occupied by something else, though it can be cast against a wall or other hard surface.
The portal can open either into a plane known and visited by the caster or a previously unknown plane. In the latter case, the caster needs some material object from that plane in order to effect the casting. The object is not consumed in the process of casting. Worldwalk portals cannot be opened into random planes—either the caster must visualize the area he is going to or the caster must have some object from that plane.
Both connected planes are visible through the portal from the other side and creatures can pass through easily from one side to the other. Nonliving objects cannot pass through the portal unless they are carried by a living being. Hostile environments cannot affect those on the other side of the portal (a portal opened into the plane of Elemental Fire would not harm anyone on the Prime Material Plane unless they stepped through the portal).
Up to 10 creatures can pass through the worldwalk portal per turn. Creatures that cannot fit through the portal cannot make the transfer unless reduced in size by some means.
Once cast, the portal is in place for the duration of the spell or until it is dispelled either by the caster's will or a successful dispel magic spell. If a creature is in the portal when the portal is dispelled, the creature is immediately sent to the Outlands. The status of the wizard who cast the spell does not affect the portal.
There is a 70% chance, plus 1% per level of the spellcaster, that the worldwalk connects with the desired plane. If the portal does not reach its intended target, it instead reaches one of the DM's choosing, including alternate Prime Material planes, other worlds, and pocket dimensions. Once cast, the portal links the two worlds and cannot be changed.
Notes: Rare spell from the Forgotten Realms setting. Known to be in Elminster's Traveling Spellbook.