Lin Xin was aware of his own limits, and knew that if it were at the level of Dao Seeking, he might have a slim chance of victory through a surprise attack by leveraging the advantage of his physical body. However, at the Scenic Level, victory was absolutely impossible.
It simply wasn't at the same level. He wouldn't even be able to break through the protective light from their magical treasures, let alone the Divine Light protecting their body or the Sacred Infant Qi that came after.
These three layers of protection were the basic defenses that every Nascent Soul True Monarch would have. Even a Sword Cultivator True Monarch specializing in the Magic Sword would have them.
To ascend to the heavens, to travel the earth, to overturn rivers and seas, Nascent Soul True Monarchs appeared almost omnipotent to the common folk.