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Table of Contents
Stone of planar stabilization
A fist-sized isometric cube of pure graphite. A protective fitted leather pouch with laces allows attachment to belt or exterior of pack.
Because graphite is highly anisotropic to electromagnetic and sonic vibrations, the presence of a sufficiently sized pure cubic sample produces a polarization effect in the space-time of any localized extradimensional space such as a portable hole or bag of holding.
This polarization allows two such extradimensional spaces to be positioned in a nested, overlapping, or touching position without invoking the typical mutually assured destruction. Additionally a minor gravitational distortion causes the space and it's contents to weight half of its regular weight, and causes the boundary layer to become permeable to air, removing the risk of suffocation.
The positioning of the cube must occur simultaneously with the overlaying of the two extradimensional spaces, and is a delicate matter requiring a successful DC 15 Dex check. Upon failure, both extradimensional spaces are destroyed in the usual manner.
A successful placement remains stable for 12-24 hours (d12+12), after which time it suddenly experiences catastrophic failure.
Removing the overlap is strongly recommended before 12 hours, but is a trivial matter of extricating the two extradimensional spaces, then removing the cube. This does not require a Dex check. A DC 5 WIS check may come into play for timing the removal in time.