This was indeed a key consideration for him.
However, the main reason he chose Han Yi was because Han Yi was not an Immortal Monarch but a Golden Immortal, and as a Golden Immortal, he possessed the combat power of an Immortal Monarch.
For this trip, his goal was aimed at a certain type of item suitable for the cultivation of Immortal Monarchs. If it had been another Immortal Monarch, disputes could easily arise, but with Han Yi, there was no such issue.
Using favors to facilitate Han Yi's intervention was the safest, most prudent, and most cost-effective approach.
Of course.
When they had met earlier, Immortal Monarch Dongming had realized the extraordinary nature of Han Yi and regretted his decision, though he did not show this regret in his Immortal Thoughts.
As for what the so-called Abyssal Demon Nest entailed, it was not complicated.
