Xu Zhu's not-good-looks were enough to depress Wuyazi but not enough to stop the by now desparate WYZ from giving XZ his power.
What if DYQ was the one who broke the chess game (and he did sort of break it by helping XZ).
Would WYZ die of fire deviation on the spot? Ugly Xu Zhu is one thing, deformed and crippled DYQ is another!