Ununtrium

Lord Dark Wind will be sending in his lawyers shortly, Bub.

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

2005 IDW 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" during this procedure; he feared that because Overlord was born on Luna 2 rather than Cybertron itself, he stood a higher chance of dying in the step of the infusion process that 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

Following the evacuation of the planet Frayus, the Scavengers travelled to Camp Conclave to try and find a rumoured stash of ununtrium. They found nothing but decided it was for the best. If any metal had been there, it would likely have been behind a series of deadly and elaborate traps that would only made them learn that friendship was the real treasure. Journey's End

The Functionist Universe

In a divergent timeline, the Senate, seeking to stymie the ambitions of the Functionist Council, sealed Vector Sigma behind an impenetrable ununtrium wall. Since ununtrium could cut ununtrium, the Functionists were only inconvenienced by this development but left the supercomputer alone in the fear that their collective alternate mode was unnecessary to activate it. Modes of Production

Years later, the Council announced "Revelation Day", announcing that Rung's alternate mode and "true purpose" was a gigantic mining tank, capable of drilling through the wall and breaching the computer. A World Misplaced After Team Rodimus had rescued Rung, he revealed the Council's plan to use Vector Sigma to birth a galaxy conquering army and that they'd simply used a standard ununtrium drill to breach the wall. Modes of Production

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 it was officially christened by the IUPAC later in the year.
• As mentioned above, Tesarus had ununtrium blades in his chest grinder, explaining how he was able to cut Black Shadow apart. When we see the DJD use a chainsaw to decapitate an alternate version of Overlord in "slaughterhouse", readers may perhaps assume that that weapon's blades had been similarly coated.

Foreign names

• Japanese: Ununtrium (ウンウントリウム Ununtoriumu)