Lin Yi automatically filtered out the bullshit and caught the main points. The extreme north island's restriction on sea beasts above nascent soul should be within a hundred miles from the coastline, and the closer one got to the island, the stronger the restriction.
Other than that, Lin Yi suspected that the problem with the restrictions on the northernmost Island was caused by LAN Guzha, the sea Dragon. With the toughness of his physical body and the terrifying strength he had gained after his mutation, ordinary sea beasts at the early or middle stage of the mountain split stage might not be able to compare with him. However, the restriction on him was still at the xuansheng stage. Therefore, it was indeed much easier for this fellow to break through the outermost restriction.
Fortunately, LAN Guzha was still unable to break through the prohibition defense on the coastline of the northernmost Island. Otherwise, the restriction on the sea beasts would basically be zero.