Just like it has incredible heroes, the Marvel Cinematic Universe also features terrifying villains. All fans remember how Hela obliterated Odin's army and pushed Thor into allowing Surtur to destroying Asgard or how Thanos erased half of the universe's population in a snap without a care. But MCU villains have also done some truly dark things that may have flown under the radar compared to these high-stakes acts.
Source：https://www.cbr.com/darkest-villain-acts-mcu/
