Cardcaptor's Mark

Intense training

Next day, the students headed for Heavy Hole and found themselves at a rocky cliff.

"Alright, we made it to the place. Now Tokoyami, can you please explain what Heavy Hole is and the conditions to the class?" Seraphina asked.

Tokoyami nodded. "Heavy Hole is a massive underground cave near Melk Mountain and is the deepest underground cave in the Human World. It boasts one of the highest danger levels in the world due to its deadly gravity and having all manner of dangerous beasts with an average capture level of 50. As you go lower, blood circulation becomes difficult.
From the surface appears as a deep canyon where light seems to disappear in this practically bottomless pit that is about ten thousand meters deep. Heavy Hole itself is located about 30 kilometers north of Melk Mountain; however it is classified as a part of Melk Mountain. The effects of the Earth's gravity are very strong due to Heavy Hole having its own special magnetic field, which also heavily alters its air pressure in its lower levels. The lower levels of Heavy Hole are completely devoid of sunlight; however the caves below are not completely dark thanks to the presence of Shine Rocks and Melk Stardust. Which is our target ingredient this time."

"Melk Stardust?" Rin asked.

"Right. It was first discovered by Melk the First, and is a miraclous whetstone to be able to sharpen any material in the world. When sharpening materials that have a high hardness level, a unique and edible golden dust comes out of the whetstone that can be used as a seasoning. Any food that it is used on to shine just as beautifully as gold. The unique edible dust is composed of several new kinds of amino acids and never-before-tasted top quality savory components. The taste of the spice is also more or less addictive due to its taste directly stimulating hunger, and would overwhelm the flavor of just about any food it was seasoned with unless they compliment each other, such as the Jewel Meat. It would be a chef's dream to prepare food with it." Izumi smiled.

"Ooh, now I'm tempted to get some!" Setsuna said.

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With help from Ibara, Monoma and Koda's quirks, the students eventually made it to Heavy Hole.

There they also encountered Melk in his workshop, although his voice was very quiet.

But Seraphina reminded him of the vibration stone that he had to make his voice louder.

With his guidance, he showed the legendary Melk Stardust.

"Wow! It's so bright!"

"Beautiful!"

"It does shine like gold!"

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As a success for finding the Stardust, the students were all treated to a big feast.

Jewel Meat Alfredo with Golden Wheat Pasta and the Melk Stardust as seasoning.

Those like Aoyama, Hagakure and even Bakugou got a power increase, but they were all getting stronger.

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After another break, their next destination was in Sand Garden.

"Now listen students:
Sand Garden is a massive desert region situated atop an isolated table-top mountain in the middle of the Wak Continent's Sand Cloud Valley and it is one of the largest desert regions in the Human World. It is 39,000,000 Sq. Kilometers. The main capital of Sand Garden is the Sand Kingdom and its most notable landmark is the Gourmet Pyramid, one of the "Seven Gourmet Wonders".
Within this desert region are many types of deserts such as "Gourmet Deserts", "Rice Deserts", "Black Sugar Deserts", "Natural Resources Deserts" and "Jewel Deserts"." Seraphina explained.

"Wow! It sounds like a paradise!" Mina said.

"Yeah, but our next target is gonna be difficult. The ingredient we have to get next is the Mellow Cola, the treasure of the Gourmet Pyramid." Izumi said.