Plane shift
From Ardrana
When the plane shift spell is cast, the caster moves himself or some other creature to another plane of existence. The recipient of the spell remains in the new plane until sent forth by some like means. If several persons link hands in a circle, up to eight can be affected by the plane shift at the same time. Note that pinpoint accuracy is rarely achieved; arriving at a random distance from an intended destination is common.
The caster of this spell must use a small, forked metal rod in its casting. The size and metal type dictates to which plane of existence, including sub-planes and alternate dimensions, the spell sends the affected creatures. Forked rods keyed to certain planes may be difficult to come by.
Note: This version of plane shift originally appeared in the 2nd Edition Player's Handbook for Advanced Dungeons & Dragons from TSR. Its use here is for the purposes of providing context for the campaign only.