Hellanium

Hellanium is a very rare element, atomic number 123, which has not so far been reproduced on Earth outside of its use in the Staff of Osiris. Apparently it exists in Osiris' home dimension, which has been colloquially nicknamed Hell. In the Staff of Osiris itself it reforms to a shape determined by the psyche of the one holding it, however it is unknown if this is actually a property of the material or if it is an extension of a psychokinetic ability caused by the staff's connection to Osiris. Only one sample of the material is currently in Chiron's possession: a shell casing found on a Prague rooftop where Nanako was when she assassinated President Zolenka in 2009. This sample has shown interesting light-bending properties.

Citations:
 * Psychokinetics
 * Hell