To avoid capsizing, Zheng Yichen waited two days for the right moment to act. During these two days, he was busy dealing with the local extraordinary creatures, which were all insane and formidable. He didn't bear any psychological burden in dealing with them.
In return, his body grew rapidly, and he received feedback from the blood he drained. There was no substantial improvement in physique, but the characteristics related to sunlight he had gained before were getting stronger. Unfortunately, such traits didn't turn him into a kind of superhuman who could become extremely powerful just by basking in the sun.
On the contrary, due to the enhancement of these traits, Zheng Yichen could sense more information from the environment and understood why those extraordinary creatures were so ferocious.