The two then contacted Lin Yu, Ran Mouri, and Yoru Kage on the research vessel via communication equipment, requesting them to transmit the underwater topographic data. Lin Yu quickly operated the equipment, sending detailed underwater topographic information to Conan and Ai Haibara.
Conan and Ai Haibara began to carefully study the terrain data and the recorded symbols. After a difficult comparison and analysis, they finally found the location indicated by the symbols—near an underwater volcano not far from their cave.
"Looks like we'll have to go check that out," Conan said.
They carefully left the cave, avoiding the mysterious creatures still lurking nearby, and swam towards the underwater volcano. As they approached the crater, the surrounding water temperature gradually rose, and the seawater became increasingly murky.
"Everyone be careful, there may be various dangers near the crater, such as sudden eruptions of lava, toxic gases, etc." Conan warned.
As they approached the crater, they discovered some peculiar stones around it, emitting a faint glow somewhat similar to that of the crystal ball. Conan picked up a stone and examined it closely, finding that it also bore symbols similar to those on the crystal ball.
“These stones might be the key to solving the mystery,” Conan said.
Just then, a deep rumble suddenly came from the crater, and the surrounding seawater began to churn violently. "Oh no, the volcano is about to erupt!" Lin Yu shouted through the communication device.
Conan quickly surveyed the surroundings and spotted a relatively safe depression on one side of the crater. "Everyone, hurry over there! We might be able to avoid a volcanic eruption there!" Conan shouted.
The group quickly swam towards the depression. Just as they reached it, the crater erupted, spewing out a large amount of lava. The molten lava cooled rapidly in the seawater, emitting a hissing sound. At the same time, the crater also released some toxic gases, which spread throughout the seawater.
“We need to find a way to reinforce the seal after the volcanic eruption ends. There must be some connection between these stones and the symbols on the crystal ball,” Conan said.
Ai Haibara carefully examined the stone in her hand, trying to find the connection between it and the reinforced seal. Suddenly, she discovered that the symbols on the stone could be arranged in a specific order to form a new pattern.
“Conan, look, the pattern formed by these symbols looks like an operating guide. Perhaps we need to follow this pattern to reinforce the seal,” Ai Haibara said.
Conan stared at the pattern on the stone in Ai Haibara's hand, lost in thought. He connected the pattern with the symbols on the crystal ball and the surrounding environment, and finally came up with a possible solution.
“I think I know what to do. We need to place these stones around the crater in a specific order; maybe that will reactivate the seal. But we need to act as soon as the eruption ends, or it might be too late,” Conan said.
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