Onyx archer Joltdoes has this in his first scene. By taking out most of the shepherds in the arena battle by himself.
It takes Einherjar to beat him down. Five of them, including Ike, and Lyn
Aurion gets a moment of awesome by himself with trolling Grima the entire time they talk. And he gets away with it.
Aurion's first appearance is this. He easily takes Ron down in a curbstomp battle, defeats the five Einherjars, one-shots Validar.
The counterparts are said to be incredible strong. Aurion is said to have killed one of them Kyle,
In Reverse Hero he's shown He shows he can easily kill all of them
The kicker. He never used his full power.