spell, a character can use the Plane of Shadow to visit other realities. It is magically morphic, and parts continually flow onto other planes. As a result, creating a precise map of the plane is next to impossible, despite the presence of landmarks. The Plane of Shadow is replaced by the Shadowfell in the 5th Edition. In first edition AD&D, the Plane of Shadow was the largest Demi-Plane of the Ethereal Plane. Mirror planes Mirror planes were introduced in the Third Edition Manual of the Planes as an optional group of transitive planes. They are small planes that each connect to a group of mirrors that can be located in any other planes throughout the multiverse. A mirror plane takes the form of a long, winding corridor with the mirrors it attaches to hanging like windows along the walls. Mirror planes allow quick travel between the various mirrors that are linked to each, but each plane contains a mirror version of any traveler that enters it. This mirror version has an opposite alignment and will seek to slay their real self to take their place. All mirrors connect to a mirror plane, though each mirror plane usually has only five to twenty mirrors connecting to it. Temporal Plane The Plane of Time was known as the Temporal Prime in the 1995 book Chronomancer. It is a plane where physical travel can result in time travel. In 3rd edition products, some of the detail of Temporal Prime became incorporated into the "Temporal Energy Plane" mentioned in the 3rd edition Manual of the Planes. Dragon Magazine No. 353 associates it also with the "Demiplane of Time" that has appeared in various forms since 1st edition. Demiplanes Demiplanes are minor planes, most of which are artificial. They are commonly created by demigods and extremely powerful wizards and psions. Naturally-occurring demiplanes are rare; most such demiplanes are actually fragments of other planes that have somehow split off from their parent plane. Demiplanes are often constructed to resemble the Material Plane, though a few—mostly those created by non-humans—are quite alien. Genesis, a 9th level arcane spell or psionic power, and the 9th-level arcane spell Demiplane Seed are among the few printed methods for a player character to create a demiplane. Among the most notable of demiplanes is the Demiplane of Dread, the setting of Ravenloft. Neth Neth, the Demiplane That Lives, was first presented in