My youth story, a crossover anime, turns out, is FGO!

The battle that took place on the coast of country M shocked the world. Although Rahm was eventually annihilated by the arriving Heroic Spirits, the sudden attack served as a wake-up call for everyone.

Under the monitoring of countries around the world, the dark waters appearing in the four oceans are expanding at an alarming rate, increasing several times or even more each day. It is likely that in a very short time, the oceans, which cover 70% of the Earth, will turn completely black. This will undoubtedly have a huge impact on human survival and activities.

First, all marine fisheries will be rendered obsolete, along with various mining and shipping operations. Many businesses will go bankrupt, many people will lose their livelihoods, and even most countries that rely on the ocean will suffer a severe blow. For example, some people in Japan, which discharges nuclear wastewater, are calling for its destruction, claiming that the ocean god is retaliating because of their wastewater discharge. In some ways, this makes a lot of sense.

This is not the most critical point. When countries are fearful, it will affect the water resources on land. If this happens, humanity will face its end before the evil of mankind is even revealed.

Not to mention that monsters like Lahem can be born in the dark sea, threatening every country in the world with a coastline, especially certain island nations, which are going crazy.

Countries around the world are now urgently seeking help from heroic spirits. Human technology is no longer able to stop the spread of the dark sea, so they can only turn to the extraordinary.

Concerning their own interests and survival, the World Security Council convened at an unprecedented speed, with an unprecedentedly comprehensive range of participating countries. No one dared to be perfunctory; all those present were powerful figures, even top leaders.

At the same time, all the Heroic Spirits that have been summoned so far have been summoned, including Heroic Spirits with evil attributes like Moriarty. The United Nations guarantees that it will not pursue any crimes they have committed, as long as they can be used in this critical moment for the survival of humanity.

When Taigong Wang first mentioned the impending doom, the nations were dismissive and even scoffed. Now, with the evidence laid bare before them and their own fates at stake, the nations are in a state of panic. If humanity perishes, all power and wealth will be for naught.

Faced with this crisis, countries have united as never before.

"You are all renowned heroes in history and legend. Is there really no way to stop the expansion of the Dark Sea?" The person in charge asked this question almost impatiently.

The various magicians and other Servants skilled in this area have already discussed it. At this moment, a handsome young man with a feather fan and a turban stood up.

"There's no other way," the follower, whose real name was Zhuge Liang, said frankly.

This statement caused an uproar among representatives from various countries around the world.

"But if we wait any longer, the entire ocean will be occupied. Can't we think of a way? You are Zhuge Liang, the strategist who restored the Han Dynasty!" The anxious, hoarse voice of the person in charge also reflected the panic of the other bigwigs.

Zhuge Liang gently waved his feather fan, sighed softly, and remained silent.

Merlin blew a breath, and pink petals danced in the air, breaking the tense atmosphere: "Please don't make things difficult for Lord Kongming. This is our collective judgment."

"In fact, we have already determined the true nature of human evil, specifically which ancient god it is."

"Who is it?" The person in charge clenched his fists instinctively.

Taigong Wang sighed slightly, stood up and said, "In Mesopotamian mythology, Tiamat is the creator goddess. Aps, who was fresh water, and Tiamat, who was salt water, gave birth to the gods together."

"So there's no need to worry about the freshwater on land being affected; Tiamat only affects the ocean, which is saltwater," Merlin reassured everyone, seemingly with a relaxed attitude.

They felt no comfort whatsoever! The faces of the representatives from various countries were all equally pale and contorted. As powerful figures in their respective countries, they received the information from their subordinates almost seconds after Taigongwang revealed the answer.

After reading the information, they were completely stunned. That was a true creator goddess. In Japan, she would be Imena, in China, she would be Nuwa, and in Greek mythology, she would be Gaia, the earth goddess. Even though Mesopotamian mythology is less common, it does not affect Tiamat's status.

If all the oceans were to fall, those island nations would be destroyed, and the continental nations would only be slowly dying.

"Is there really no other way?" The representatives of the island nations in the Pacific were practically going crazy.

“There’s no way to solve it, but we can delay it for now.” Merlin spoke casually, seemingly unreliable, yet his words gave everyone hope. “At the current rate, the Chaos Tide will engulf the entire ocean in two or three weeks at most, especially the countries in the archipelago, who won’t even have time to escape.”

"You can leave this problem to me," Merlin said with a smile.

"Actually, what I am here is not my true form, but just an illusion. My true form has gone to the deep sea and used a little magic to put Tiamat into a temporary slumber." Merlin's words made everyone's eyes light up, but the white-haired nightmare waved his hand helplessly, "Don't overestimate me. I did manage to do it, but the slightest movement will awaken her, and then I will be crushed by her like a little insect."

"Once she wakes up again, the erosion of the Chaos Tide will completely erupt, and it will probably only take seven days to devour the whole world."

"And don't count on me for the battles that follow." Merlin pleaded. "This is all I can do. I'll buy you all some time, about three months. That's all the time we have to retreat and prepare for war."

"Thank you so much, Your Excellency Merlin!" The person in charge said this sincerely.

At the same time, representatives from various countries willingly bowed to Merlin, for the three months he had fought for could save countless lives.

"Attention everyone," Zhuge Liang broke the slightly relaxed atmosphere, "Given the time it will take for the Chaos Tide to spread, we have four months to prepare, and at the same time we must deal with the attacks of this monster."

A pitch-black, hideous monster appeared on the big screen, eliciting gasps of surprise.

"Rahmu, a demon born from the goddess Tiamat."