What's the allusion to "The Dragon King Temple was washed away by the flood"?

Legend has it that a long time ago, there was a Dragon King Temple on the east coast. A few miles away from Longwang Temple, there is a vegetable field next to a temple. The old monk in the temple and the old man who grows vegetables are good friends. They often play chess and chat together.

One day, when they were chatting, the old man mysteriously said to the old monk, "Abbot, a miracle happened. Originally, I watered the garden of my two acres, but since yesterday, when I went to water the garden, the garden had been watered, and I didn't see who did it. Do you feel strange? " The monk was surprised and decided to go and have a look and get to the bottom of it. That night, the old monk came to the vegetable garden early and hid not far from the well. Staring at it all night, when it was almost dawn, I suddenly heard a "click" sound, and a white light came out of the well and flew out of a monster like a goose. I saw his two big wings "slammed" a few times and the well water overflowed. Blink of an eye, the monster flew into the well again. When the monk walked to the well, all the plates had been watered. Three nights in a row.

The old monk practices martial arts. On the fourth night, he brought a sword. As soon as the monster flew out of the wellhead, it jumped up and stabbed several times. The monster cocked its wings and plunged into the well. Suddenly, there was a loud bang, and the well cracked a few acres of land, and the water rolled. Blink of an eye, even a few miles before the Longwang Temple is a piece of Wang Yang. The dragon king was furious and led the sailors to fight the monster. After three days and nights of fighting, the monster was outnumbered and showed his true colors. It turned out to be the three princes of the Dragon King, who were expelled from the East China Sea for three years for breaking the law. The third prince wants to do something good on earth to make a contribution. I don't want to be stabbed by a monk. In a rage, he opened the sea eye and flooded the Longwang Temple. When fighting with the Dragon King, they were afraid to reveal the secret, which caused a misunderstanding.