Concerning his doubts about Su Xin's cultivation technique, Ghost Fox no longer thought much about it after giving it a round in his mind.
His life was still in Su Xin's hands, so what was the use of thinking so much?
Ghost Fox carefully said, "Young Master Meng, now that you have destroyed all seven mountain fortresses, can you let me go?"
An inscrutable smile appeared on Su Xin's face. "Want me to let you go, huh? Very simple, answer one question for me and I'll let you go."
Ghost Fox was somewhat unnerved by Su Xin's smile: "What question?"
"One plus one equals how many?" Su Xin asked.
"Ah?" Ghost Fox was taken aback, but he still said instinctively, "Two."
"Pfft!"
A finger of energy pierced Ghost Fox's chest, causing him to fall to the ground with a look of confusion and unwillingness.
"Sorry, you still know too much."
Su Xin could use the Blood River Divine Sword technique, but 'Meng Qingze' could not.
