"What do you say?" Xingzi asked the calf, finally returning to the original subject, the contents of the box.

The little calf looked at Tai Shiman meaningfully: "Boy, where did you get this thing?"

"I can hear the sound inside, but no one else can hear it," and then Tai Shiman told him about the origin of the contents of the box.

It turned out that Tai Shiman was a child from a small mountain village who helped his blacksmith father when he was eight years old. During a mining trip, an arm was inadvertently slashed, and as a result, the stone face began to shake and make a sound similar to a heartbeat.

In the Immortal True Continent, even mortals know that there are immortal cultivators in this world, and some of the immortal family's methods and magic weapons. At that time, little Aman thought that he might have found some treasure! He took great pains to dig up the heartbeat stone, carried it home and told his father, who did not know what it was and could not hear the heartbeat of the stone, and tried to break and smelt it, but it did not move at all. Aman was helpless, so he left it in the corner of the blacksmith's shop.

Until one day, an immortal cultivator came to the village to stay at his house, and the old man looked at the things in this corner vigorously, and Aman looked at the old man's ass at that time, and couldn't help but ask: "Immortal master, old man, do you know what it is?" The old man hesitated, and said decisively: "This must be a good thing!" As for what it was? There was no follow-up, and the old man also told Aman to take good care of this thing.

The old man liked Aman very much, and when he parted, he gave Aman a letter of recommendation, informing him that he was from the Star Academy, and asked Aman to go to the academy to report that he could practice immortal law. This pair of mortals in the ravine is undoubtedly a huge pie to smash down! Aman's father resolutely let his son go to cultivate immortals, and asked him to bring something that the old gentleman said must be good things, and also told him not to show others, the outside world is very dangerous!

After listening to Aman's story, the calf snorted, and a thick breath shot out of his nose, surrounding the dark brown thing.

After a moment, the thing glowed red from the inside out, "Pounding, pounding.." This time, Xingzi and Mai Jia also heard it.

"That's right, it's the Heart of the Earth." The calf said firmly.

"What is the heart of the earth?" asked Tai Shiman this time.

The calf pointed to his feet, "For example, the continent or planet where you are located will have the power of the origin condensed in the center of the earth, and it can be said that where is the essence of the entire planet." When the power of the Earth's Origin is insufficient, the planet is likely to disintegrate, and when the Earth's Heart is sufficient, the "Heart of the Earth" may be born, and this piece of yours is a fragment of the Heart of the Earth.

After seeing it for a long time, the three children listened to it as if they understood. Xingzi understands better that the so-called heart of the earth is the core of a planet, the general engine of the planet.