This fist-sized cube is cut from solid carnelian, and each face contains a stylized glyph that corresponds to a specific planar location.
Wondrous Item 3,125,000 gp
Power (Teleportation) Daily (Minor Action)
Depressing one side of the cubic portal opens a portal in an unoccupied square up to 3 squares away from you. The portal remains open until the end of your next turn and leads to a permanent teleportation circle in another location. Any creature entering the square occupied by the portal is teleported to that destination.
Each side of the cube opens a portal to a different permanent teleportation circle, which is determined at the cubic portal's creation. The portals are misty, restricting vision to 5 squares into the destination. Until the portal closes, creatures can move freely between portal and teleportation circle.
Sustain Minor. The portal remains open until the end of your next turn.
Published in Manual of the Planes, page(s) 158.