Cul Borson

Cul Borson, known as the Serpent, is an ancient Asgardian deity and brother of Odin who was imprisoned long ago after being deemed too fearsome to rule. His release triggers a wave of primal fear across the Marvel universe.

Few villains have shaken the Marvel Universe to its foundations quite like Cul Borson, who burst onto the scene in 2011 courtesy of writer Matt Fraction and artist Olivier Coipel in The Mighty Thor. A dark presence within Asgardian royalty itself, Cul shares his pages with some of the mightiest names in the Nine Realms — Thor, Odin, Loki, Sif, and Hogun — lending his debut era a genuinely epic, world-threatening weight. His footprint across Fear Itself and the broader Thor corner of Modern Age Marvel marks him as a figure of real consequence, the kind of antagonist whose arrival reshapes the stories around him. If you're tracing the grand, storm-swept mythology that defined Marvel's Asgard in the 2010s, Cul Borson is a name you'll want to know.