Priot to Trial 13, Agon was a superhero who dominated the Chicago crime-fighting scene. The downside to this was that young heroes, like Renée, were shut out.
Then the Newlydeads were tasked with helping Renée defeat Agon for one of their Trials. It was a fairly short fight, even though Agon cheated at one point, and the Newlydeads triumphed once again.
Agon's powers seem to be simple super strength.