He possesses virtually limitless strength and durability. His signature trait is unstoppable momentum —once he starts moving, no physical force on Earth can halt him.
In recent 2020s storylines, Cain has transitioned from a villain to a legitimate hero, even becoming a member of the X-Men . Gaming: Tactical Streaks and Hero Blades Juggernaut
In Marvel Comics, the Juggernaut is Cain Marko, the stepbrother of Professor X. Unlike most X-Men characters, he is not a mutant; his powers are mystical, granted by the found in a hidden temple during the Korean War. He possesses virtually limitless strength and durability
His primary vulnerability is mental attacks. This is why he wears a signature heavy helmet to shield his mind from telepaths like Charles Xavier. the Juggernaut is Cain Marko