Chthon is one of the most terrifying demons in Marvel Comics. One of the Elder Gods of Earth, Chthon is the writer of the Darkhold, the e-book of chaos that Agatha and later Wanda own in the MCU.
WandaVision hinted at Chthon’s capability arrival with its creation of the Darkhold. Wanda and Agatha’s tales are deeply intertwined with the demon and the Darkhold, and Coven of Chaos may want to discover that link and use it to resurrect Billy and Tommy. Plaza ought to play Chthon’s human form or possibly a witch in his service; both way, having her play the person might be an stimulated choice from Marvel.
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