Guo was the weakest out of nine who were present here. However, he still had years of experience of being a Holy Priest who had mastered a lot of the Holy Spells himself. His strength could never be underestimated. Even Gabriel understood that.
Despite having some really decent spells of Light that he learned in the Tower of Challenges, he wasn't a hundred percent sure if he could win since his one of the most powerful spells of Light was something that relied on him using the Element of Darkness.
Gabriel understood perfectly well that in this battle, if he couldn't win, he might need to expose his other Elements. That's why he needed to do something for a safety net. He needed to make sure that no matter what he did, he could succeed.
"Are you ready to challenge him?" The first Holy Lord asked Gabriel.
Gabriel didn't reply immediately. It was as if he was still thinking of something.