Harry Potter and the Great Old Ones.

Chapter 773
"They," Jeffrey asked, puzzled, "why are they so interested in mixed-race descendants?"

"According to your imagination and understanding, they are immortal and have the backing of two divine beings and an Old One. Their offspring should be scattered throughout every corner of the deep sea, right?" Tiera asked, taking a sip of seafood soup.

“Yes.” Jeffrey nodded.

“No, their population is very small,” Tiera said. “Unlike humans, they have no desire to touch each other’s bodies, and they are not very enthusiastic about mating. In fact, it may take three or four hundred years for them to have a new generation of members.”

"Their father god Dagon and mother goddess Hydra even had to summon all the Deep Ones to a certain place in the depths of the Pacific Ocean every hundred years to hold a grand Cthulhu worship ceremony, and after the ceremony they were forced to mate with each other in order to maintain a certain population."

“Moreover, most of them, apart from being immortal and able to move freely in the deep sea, don’t have any special abilities,” Tierra explained to Geoffrey. “Their combat power on land and in shallow water is even inferior to that of a student who has just graduated from Hogwarts.”

"So when they are wandering in the ocean looking for food, these deep-sea divers are often hunted by sharks, sperm whales, killer whales and even dolphins. Especially during World War II, the torpedoes launched by the Muggle naval battles further reduced the population of these deep-sea divers."

Jeffrey paused for a moment, pondering Tierra's words. Their interest in mixed-race descendants was gradually becoming clearer.

"So they want to increase their population by interbreeding with humans to have more offspring?" Jeffrey tried to conclude.

“Yes and no.” Tiera nodded, then shook her head. “Although there is not enough evidence, we have reason to believe that the so-called Deep Ones are actually a race forcibly created by the Father God Dagon and the Mother Goddess Hydra with the power of the Great Cthulhu.”

“The first Deep Ones were probably ordinary humans who were endowed with Cthulhu powers,” Tiera said. “Otherwise, it’s hard to explain why they showed little interest in their own kind, but were particularly interested in human women or men.”

"The period of greatest population explosion for the Deep Ones was during the Age of Discovery from the 15th to the 17th centuries and the Triangular Trade period in the 16th century," Tiera continued. "At that time, due to the increase in the number of humans going to sea, many male Deep Ones would put on loose captain's uniforms and captain's hats that could cover their faces, and under the cover of night, they would go to the ports and islands established by pirates, exchanging exquisite precious metal handicrafts for the favor of those beautiful women for a night."

“It was even more convenient during the triangular trade period,” Tiera said with a smile. “They would follow those slave ships and retrieve the black slaves who were about to die or had infectious diseases that had been thrown into the sea.”

“Although those black slaves looked very similar to them, they still had a certain degree of human form,” Tierra said.

"Then they must have a lot of mixed-race children in the Muggle world. Why don't you look for them in the Muggle world?" Jeffrey asked curiously.

“Because they are not wizards.” Tiera smiled. “Did you think Deep Ones, like mythical creatures, could use magic? No, no, no, they can’t.”

(End of this chapter)