Ununtrium
Drawn from the compacted subatomic matter of a collapsed star, Ununtrium is an incredibly rare, indestructible metal bonded to the endoskeletons of Warriors Elite to massively increase their durability.
Fiction
IDW Generation 1 continuity
Ununtrium was bonded to the endoskeletons of Sixshot, Heretech and Black Shadow. Tesarus of the Decepticon Justice Division also possesses a number of Ununtrium-coated blades in his stomach cavity.
One million years into the Great War, in the Foundry while preparing to infuse Overlord, the Decepticon scientist Rossum noted to Megatron that he thought there was no more ununtrium to be found anywhere, and was concerned that it might be "wasted" on Overlord, who was born on Luna 2 rather than Cybertron itself, given the arduous process which involved superheated propex, heating the Transformer to almost the point of death. Megatron dismissed the concerns, and the metal was successfully infused, bonding to Overlord's endoskeleton "in excess of 90% coverage" and rendering him virtually indestructible. Remembrance Day
Sixshot would boast that his armature was forged from metals drawn from the compacted subatomic matter of a collapsed star as part of a list of why he was so tough. Devastation #4
Notes
- While ununtrium is an actual element - element 113, to be precise - it does not occur in nature, and no isotope has yet been synthesised with a half-life of more than twenty seconds. As no elements heavier than lead (element 82) have known stable isotopes, it's unlikely a non-radioactive isotope exists. [It probably ain't indestructible either.]
- Ununtrium (meaning literally one-one-three-ium) was the element's temporary name; RIKEN, the institute currently credited with its discovery, settled on Nihonium as its proper name in March 2016, and was officially christened by the IUPAC later in the year.
