Lin Jian was reluctant to encounter an opponent like the dragonkin. His ocular skill was in favor of defeating souls. He would benefit from the skill in every way when battling a powerful opponent.
However, the dragonkin was a unique type of monster as its soul would grow in pace with its body ever since its birth. It was common knowledge that it had a very strong body. As a matter of fact, its soul was equally powerful and was immune to many of the soul attacks as well.
The dragonkin monster that Lin Huang summoned would restrain Lin Jian. This was also the reason why he was unwilling to pit himself against the dragonkin and its Imperial Censor.