An extremely advanced mastery of matter and energy control is required to design a disposable singularity. A singularity (otherwise known as a black hole) is contained in a special anti-grav containment field; disposable singularities are of very low mass (relatively speaking), although their actual mass is hidden by the anti-grav field, rendering them essentially “weightless”.

A disposable singularity can be thrown, at which point the containment field deactivates and the black hole’s gravitational force starts to overpower the area. The singularity itself renders one 5’ square impassable (contact with the event horizon within that square requires a Severe [29] END check just to survive), and an area with a 30’ radius around the singularity becomes a high gravity environment. The singularity is small enough that it evaporates from Hawking radiation in five minutes. The singularity cannot be used as a thrown weapon - it will not land in the same square as an existing creature.