Against a God
Occupying a quarter of the enter Divine Colosseum in order to train for the upcoming Tournament of the new Gods, the fact that Jason was suddenly standing opposite Keran astonished the few present Celestias.
Some of them had seen Jason fighting against Juan, less than 250 years ago, and thus had a fair idea of his strength and fighting spirit.
As such, they didn't believe that the young halfling was capable of defeating Keran, not after his God's Halos were adjusted to the domain of the strongest and newly advanced Celestia Gods.
After all, two of his God's Halo's unique traits focused on enhancing his Celestia aura, thereby increasing the pressure on his opponents.
This only meant that his domain would become even more fearsome, which was certainly not something one would want to face head-on.
But even if Jason's decision to fight Celestia God Keran was certainly weird, the same could be said about the fact that Keran accepted Jason's challenge.