Lin Shen was well aware that he couldn't defeat Ximen Swordsman with skill alone.
To beat Ximen Swordsman, there were only two paths to take, one was to overpower him with absolute speed and strength, rendering his Skill of Borrowing and Transforming Force useless.
That was a path Lin Shen could take, but it required using the Super Base Form and all his Base Mutation Talents to crush Ximen Swordsman with an overwhelming advantage.
Lin Shen did not want to take that path, firstly because it exposed too much, and secondly, under such circumstances, it would inevitably lead to a fight to the death with no way to hold back.
Although Ximen Swordsman was not exactly a friend to Lin Shen, during the battle with the Wan Family, for whatever reason, Ximen Swordsman had lent his assistance.
Therefore, Lin Shen was not willing to truly fight Ximen Swordsman to the death, and killing Ximen Swordsman offered no benefit to Lin Shen.