The aspect that most attracted Li Zhirui was what Li Zhixuan had said last.
As Master Dao Tong was about to ascend through Tribulation Transcendence, if it were truly possible to help him eliminate the Demon Seed within him, then Li Zhirui's additional request likely wouldn't be refused by the Ten Thousand Swords Sect.
Li Zhirui was now in the middle stage of Divinity Transformation Realm, and there was still quite a distance to cover before his own Ascension, but he couldn't possibly wait until he was about to transcend before considering these matters.
Moreover, the Li family didn't have any closely related Transforming Spirit forces, so when the time came for Li Zhirui to observe Tribulation Transcendence and learn from it, he wouldn't have anyone to turn to.
Master Dao Tong was the best candidate.
"Good!"