Another small cubic device, this item is fashioned from carnelian.

The 6 sides of the cube are each keyed to a plane, 1 of which will always be the Prime Material, of course. The other 5 can be chosen by any means desired. 

If the side of the cubic gate is pressed but once, it opens a nexus to the appropriate plane, and there is a 10% chance per turn that something will come through it looking for food, fun, and/or trouble. 

If the side is pressed twice, the creature so doing, along with all creatures in a 5-ft radius will be drawn through the nexus to the other plane. It is impossible to open more than 1 nexial link at once.