Bals is indeed very smart; in close combat, he was at a disadvantage against Xia Yu, but he quickly spotted Xia Yu's weakness.
The most effective and quickest way for Xia Yu to use gravity to attack enemies is to lock her eyes on the target. Although her domain can expand her ability to cover the surrounding area, the speed of release is slightly slower, making this brief delay the target of Bals' attack.
From their previous exchanges, Bals had roughly gauged Xia Yu's domain range. He attacked from the blind spot of Xia Yu's vision at a very fast angle, repeatedly withdrawing as soon as he noticed any changes in the surrounding gravity field. After several such cycles, it was clear that Xia Yu was drenched in sweat from excessive use of her abilities.
We can't go on like this. Pei Yan, after observing and analyzing the situation, turned around and charged in. As Bals attempted to withdraw after a failed sneak attack on Xia Yu's domain, Pei Yan timely blocked his retreat.
