When Marvel's Black Widow hit theaters and Disney+ last week, it snuck in the Marvel Cinematic Universe's first mutant in the form of Ursa Major, member of Russian mutant team the Winter Guard--at least if actor Olivier Richters' Instagram post is accurate (via Uproxx).

After Natasha Romanoff's peaceful, if false, life in Ohio is upset so that she and her adoptive sister can be trained as an assassins, their mission-father Alexei Shostakov ends up in a Russian gulag where we find him effortlessly arm-wrestling (and maiming) a giant man he refers to as Ursa.

The post features Richters flexing alongside a gallery of comic book shots of Ursa Major, who has the ability to turn into a bear. In the comics, Ursa Major is a mutant like the X-Men, New Mutants, and the Brotherhood of Evil Mutants.