Egron

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Not to be confused with the Ergon.

Egron (also known as Egron the Flesh-Eater) was a shape-shifting fugitive hunted by law-enforcement mechanoid DRC-1000. Egron took the form of the TARDIS and trapped Amy Pond within, threatening to digest her. The Eleventh Doctor overcame Egron with the foul-smelling fungi abundant on the planet of capture and Amy was vomited up. (COMIC: Mistaken Identity)