Iridikron

Iridikron the Stonescaled is one of the four Primal Incarnates. Along with his brethren, he rejected the gift of the titans and turned to the elements instead, becoming an incarnation of the earth itself.

Iridikron was a reclusive and withdrawn proto-dragon who usually kept to himself at Harrowsdeep, a cavern in northern Kalimdor that he made his home. He was longtime rivals with Neltharion despite being close as clutch-mates before the titans uplifted Neltharion, the two being nearly equal in strategy, cunning, and strength. Iridikron was the one who discovered the method by which the proto-dragons could imbue themselves with elemental energies to become the Primal Incarnates, but he was not the first to do so. Fyrakk was the first to survive the process, and Iridikron then recruited Raszageth as the second without Fyrakk's consent. Iridikron was the third to become an Incarnate, after which he usurped control of the Primalists from Fyrakk. Iridikron's sister, Ikronia, became an ordered dragon of the black dragonflight but came to regret it. When she came to her brother for help, iridikron used her as a tool to propagandize against the dragonflights, having her destroy mortal settlements so that they would think that the dragonflights were behind it.

While the proto-dragons who would become known as the Dragon Aspects accepted the gift of the titans, the proto-dragons who would become the Primal Incarnates rejected it. Tensions rose between the Primalists who wished to cleanse the world of the titans' "stain" and the dragonflights, breaking out into open rebellion about 20,000 years ago when Raszageth struck first by leading an assault on Neltharion and his dracthyr army on the Forbidden Reach. In the battle, she destroyed Oathbinder, the titan relic which Neltharion was using to control the dracthyr. This caused Neltharion to give in to the Old Gods for the first time and use their power to seal her away within the Froststone Vault.

A cataclysmic conflict ensued between Primalists and dragonflights known as the War of the Scaleborn. Vyranoth and Fyrakk were ever loyal to the Incarnate's ideals, but Iridikron truly embraced the war. At the end, he struck terrible bargains to keep their cause alive. Alexstrasza believes the other incarnates never knew the true depths of his depravity. Despite the Primalists' alliance with the djaradin to end the dragons' reign, the remaining Primal Incarnates were ultimately defeated, but Alexstrasza, having failed to restore peace between the two groups, still couldn't bear to kill them given they had once been as close as clutch-mates, and decided to imprison them instead, within the titanic Vault of the Incarnates.

20,000 years later, Raszageth the Storm-Eater was freed by Kurog Grimtotem, and schemed to release her kin from the Vault. The Aspects were fearful of "Iridikron's hunger" being unleashed. Though Raszageth died, she succeeded in her endeavor and Iridikron, Fyrakk, and Vyranoth were released. Seeing how Raszageth's haste led to her downfall, Alexstrasza speculated that the Incarnates would take their time to gather their strengths first, and that Iridikron's mastery of the earth would harbor them in the meantime.

Fyrakk was eager to take revenge for their sister, but Iridikron did not want to rush in and believed they needed to even the scales with the Aspects first. The Incarnates adventured to the Forbidden Reach as the last echoes of Raszageth's storm faded, where they breached an ancient vault belonging to Neltharion and found a device that would give them the location of Zaralek Cavern, the Earth-Warder's secret underground domain. They had no interest in the laboratory of Aberrus itself, but in the molten fire that could be found below. Scalecommander Sarkareth and the Sundered Flame followed behind them secretly to claim Neltharion's legacy.

They found one of the hidden entry points to Zaralek right below Valdrakken, where they broke through the ground and sent Fyrakk down, blazing through the earth, to claim the elemental power below and wake the djaradin's Elders at the Zaqali Caldera.

Iridikron soon struck a dark bargain with the infinite dragonflight, traveling back to the past to acquire the essence of Galakrond. During the encounter, adventurers and Chromie ventured to the upper impact area of Galakrond's corpse, where they engaged in battle against the Incarnate. While the adventurers provided an opening for Chromie to destroy the artifact Iridikron was using, Chrono-Lord Deios managed to trigger the birth of Murozond. Consequently, Chromie was forced to undo their victory over Iridikron - traveling back in time to stop Deios. By saving Nozdormu, Iridikron was able to complete his mission and departed from the past through a void portal.

The announcement trailer shows Xal'atath holding the artifact that Iridikron had used to drain Galakrond's essence, implying an alliance between them.

• Iridikron is actually missing his arms in his dragon form; his chest instead a somewhat cracked open core that sparks with energy. In his visage, he possesses arms.