The Light Mage and the other Light-Type heroes had yet to understand the severity of the situation.
They still believed that the Red-Eyed Black Dragon had handed the gems to make Su Wan trust them.
The Starlight Swordsman stared at Su Wan in disbelief. "No…," he said. "She only has one gem."
The Starlight Swordsman had a unique ability that could sense the aura of things. He could sense the aura of only one gem on Su Wan. He was confused. Su Wan should be in possession of two gems at this point. Her own gem and Lord Bevin's gem that he had given her to gain her trust.
What the Red-Eyed Black Dragon said didn't match with what the Starlight Swordsman felt. The Starlight Swordsman explained this to the others. They were stunned. Either Su Wan had somehow hidden the gems, or Lord Bevin was lying to them.