Although Marvel Studios officially announced Eternals, and much of the cast, last month at Comic-Con International, notable additions were revealed Saturday at Disney's D23 Expo in Anaheim, California:  Game of Thrones star Kit Harington, Captain Marvel co-star Gemma Chan and Dunkirk actor Barry Keoghan. While Marvel Comics fans may be familiar with Harington's Black Knight and Chan's Sersi, it's Keoghan's villainous character that has left some scratching their heads.

Introduced in 1977's Eternals #11Druig is the son of the Celestial Valkin and cousin to Ikaris, played by Game of Thrones veteran Richard Madden. The character has several superhuman abilities, including telepathy, flight, telekinesis and matter transmutation. Druig has been a power-hungry schemer since childhood who took any chance he could to seize control.

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A thousand years ago, during the preparations for the Third Host of Celestials, Druig sneaked away from his family, and attempted to steal power from the Deviant Mutate known as Dromedan, but instead unleashed the weapon. With the help of Thor, the Eternals were able to vanquish the beast, but not without paying a price. Ikaris' father Virako was killed in the battle, which led to Valkin adopting his now-orphaned nephew. With Ikaris as his adoptive brother, Druig grew increasingly vindictive against his cousin, who was considered superior to him in virtually every way. That was the last we would hear of Druig for quite some time.

In the modern era, Druig resurfaced as an agent of the KGB who made a name for himself by torturing people. Shortly thereafter, Druig was disintegrated by Ikaris after the villain attempted to kill Ziran the Tester. His body was recovered by the Celestials, who placed him in an everlasting chamber at the Desecration Annex.

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Druig was eventually freed and became deputy Prime Minister of Vorozheika (a fictional country to the northeast of Chechnya) under the name "Ivan Druig." The villain then created a hostage situation by kidnapping wealthy guests and scientists he had invited over for a party with the help of Sersi. However, Druig lost control of the situation and ultimately found himself exiled from the country. He would go on to return to Vorozheika and force all of the heads of government to make a choice: They either stand with him or die. After one government official failed to eliminate Druig and was forced to kill himself, the others ultimately bent to his will.

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From there, Druig would go on to leave Vorozheika in search of the other Eternals, who were trying to stop the Dreaming Celestial from destroying the Earth. After the threat was handled, Druig began to brainwash Eternals and grow a following of nearly a dozen superhumans. However, his cousin, Ikaris, caught wind of his Druig's plans and attacked Vorozheika. Alongside the X-Men, Ikaris managed to face off against Druig's forces, but the two sides were forced to call a truce when the Horde threatened Earth.

As always, it's probable Marvel Studios will alter Druig's characterization a bit for the film, but either way, he has the potential to be one of the studio's most notable villains.

Directed by Chloé Zhao from a screenplay by Matthew and Ryan Firpo, Eternals stars Richard Madden as Ikaris, Kumail Nanjiani as Kingo, Lauren Ridloff as Makkari, Brian Tyree Henry as Phastos, Salma Hayek as Ajak, Lia McHugh as Sprite, Don Lee as Gilgamesh and Angelina Jolie as Thena. The film arrives in theaters on Nov. 6, 2020.

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