C571 First World War

It was just a few simple sentences, but it already explained what Xu Yan had to do.

Honestly speaking, even Xu Yan himself was very surprised, under such a situation, how could the final test have come in advance? Before coming here, Qing Xu had told him that the soul of an expert at the level of a great Emperor was to be used as the final guardian. Even Xu Yan himself didn't really believe it