Kirbinite

The supernatural metallic ore known as Kirbinite is a rare form of Eternian alloy recurring in He-Man and the Masters of the Universe (2021).

Overview
A form of celestial metal capable of transferring and channelling cosmological force between different waiting focal points. A great many materials throughout the series proper are all hewn from said mythological ingot to better focus the energies of the universe, such as the Power of Grayskull or the Power of Havoc. Mined by the denizens of Eternos city, access to which is ordinarily reserved for its adjacent Man-At-Arms; the master craftsmen heralded by the King himself.

History
Kirbinite is a super-metal native to the mythical world of Eternia. One of the rarest, most sought after forging materials the world has ever known to creation. Most of which is mined by the denizens of the capital city; Eternos, for the sake of forging their utilities and armaments pushed towards national defense.

Millennia ago, the fabled Kirbinite was also used to craft a feasible means of harnessing and manipulating varied metaphysical force energies of universal import. That being the Sword of Grayskull and the Havoc Staff.

Both weapons channeling the differing powers of the Universe, each of which serving as pivotal cornerstones in a test of character by the very vessel they were once forged in by its original keepers. The mighty blade that belonged to King Grayskull himself channeling the light side of all the power in the universe, while the scepter, which wasn't forged of Kirbinite, harnessed the darker spectrum of cosmic quintessence known as Havoc. Some centuries later; there would be a coup held within Castle Eternos headed by Keldor, Evelyn and the former Man-At-Arms Kronis.

Randor's evil younger brother would kidnap his only son, Prince Adam in an attempt to spirit away with the Power of Grayskull for the sake of usurping the monarchy for himself. But the 1st Prince would fail the castle's challenge presented to him by its guardian, the Eldress. His choosing chaos and darkness over the light of good steadily eroded him body and soul as a consequence.

About a decade later, Keldor now going by the identity Skeletor would seek to resume his blood feud with King Randor and seize the throne of Eternia by corrupting all his dominion surveyed with the maleficence he would later embrace.

When coaxed into lending this newfound power by Evelyn, the King of Darkness, disheartened, admitted his Havoc Staff lacked the capacity to transfer higher tier energy as what his nephew's sword had done for the contemporaries of Castle Grayskull. Due to in part to the exiled royal's signature weapon lacking the conduit needed to do so. A lie on Skeletor's part, fermented to string his cohorts along until he secured the means of conquering his old home nation. The disgraced Kronis would suggest procuring his employer's much needed element from the Palace storage unit in order to upgrade the lord of Snake Mountain's symbol of authority. They would accomplish such conniving by capturing General Dolos of the Eternos' royal guard; by filching the guardsmen's identity, Kronis was able to sneak back into the city undetected whilst procuring said mineral needed to enhance their factional strength.

Afterwards, and with the new addition to their ranks, Skeletor immediately set about taking and augmenting his chosen warriors straits by bestowing their signature weapons with Kirbinite to link each individual to his corrosive energies. Granting them new powers and enhancements bestowed by their master through Havoc. In doing so, however, the process of reforging ended up creating a superstorm that nearly wiped Eternos off the map.

It was a coincidental happenstance which led to Adam reuniting with his father around the time that Skeletor's machinations caused the Havoc Storm. The former telling said leige that not only was his son alive, but none other than this mysterious strongman wielding the sword of their ancestors. The lost prince revealing to his father that he in fact was He-Man. Adam and his new Masters of the Universe (minus Krass) set out to preempt whatever schemes Keldor was concocting within at Snake Mountain in the Fright Zone.

The four of them being waylaid and defeated by their newly arisen counterparts; Skeletor's new Dark Masters, courtesy of their overlord's galvanization of Havoc power. The Sword of Grayskull left broken, the kids captured and left to marinate in liquid Havoc as a consequence.

Sensing that something was amis when her Grayskull infused helmet splintered while defending her home. Krass went along with Ork-0 to rescue them. The two being able to fish out their beaten and depowered teammates while Skeletor, with the mind controlled Dolos under his thrall, laid seige to Castle Eternos and the city governed by it.

In that time, Skeletor had to deal with the mutiny of his evil warriors, who secretly contemplating their betrayal since their introduction to the Havoc power they were promised. But the mad conqueror knew full well of their intent and revealed his ruse regarding the Kirbinite used to reforge their battlements, having used them to assume complete control over his seditious minions in the same manner he'd subsumed the general and his Red Legion army to his beck and call, stating he'd always had the capacity to bestow Havoc upon his emissaries, but lacked the ability to control them without his future kingdom's precious ingot. Skeletor also revealed he tricked them into giving him the means of bestowing, as well as taking away their newfound facilities with a gesture to keep the lot from turning on him, boasting he was now master of their universe.

Appearances

 * Orko the Great
 * The Calm Before the Storm
 * Cry Havoc, Part 2

Netflix

 * Poisoned Chalice
 * The Most Dangerous Man in Eternia
 * The Forge at the Forest of Forever