Avengers: Infinity War co-director Joe Russo just revealed why Thanos is the Marvel Cinematic Universe's most threatening villain yet: he has no weaknesses.

"He's stronger than the Hulk. He's more like Genghis Khan. He's a force of nature. He has a spiritual wisdom well beyond all the other characters," he explained to Empire Magazine. "He is a conqueror of worlds. He doesn't have a weakness, and that's what makes him so threatening."

RELATED: Avengers: Infinity War Is Really Thanos’ Movie, Writers Say

Stephen McFeely and Christopher Markus, the film's screenwriters, also recently discussed what makes Thanos such as a compelling villain. "One of the big challenges is how to make sure he’s not just a relentless machine collecting stones like he’s going shopping," McFeely said. “So we want to give him a full weighted emotional story. You can kind of say this is Thanos’ origin story so that he will get the weight of any of the previous heroes in terms of the decisions he has to make in order to get what he wants.”

Directed by Joe and Anthony Russo, Avengers: Infinity War stars Robert Downey Jr., Chris Evans, Chris Hemsworth, Mark Ruffalo, Jeremy Renner, Scarlett Johansson, Paul Bettany, Anthony Mackie, Paul Rudd, Elizabeth Olsen, Tom Holland, Benedict Cumberbatch, Chadwick Boseman, Chris Pratt, Zoe Saldana, Dave Bautista, Bradley Cooper, Vin Diesel, Tom Hiddleston, Peter Dinklage and Josh Brolin. The superhero ensemble hits theaters on April 27.

NEXT: Infinity War: Thanos' Modified Origin Actually Makes Him Sympathetic

via ComicBook.com