The hidden realm you stumbled upon in your youth had time dilation, which is extremely rare for a dungeon or hidden realm. Even using my time magic, I can only determine that it has been at least 10,000 years. The time fluctuations of that hidden realm were simply too unstable to get an accurate reading.

"That is how you've gotten so strong," the demon lord said. "You put in a lot of hard work and effort, but even so, you wouldn't have been able to progress so quickly if it wasn't for the hidden realm. You were lucky enough to come across a fountain of youth, the type that grants eternal youth, not just de-aging you. You wouldn't have lived long enough to exit the hidden realm otherwise."

Crystal's mother smiled bitterly and said, "It's not like I didn't tell them about the fountain of youth. It was simply gone by the time we all met up again. After all, it took several years for us to reunite. Those few seconds of difference when we entered the hidden realm were probably several years on the other side. We were separated for about eight years."

The demon lord added, "This space dungeon is going to have annoying space bugs, the type of monster that endlessly devours and multiplies. This is quite common for space dungeons. Although there are monsters different from space bugs, space bugs are the most common type of monster in space dungeons, with only rare exceptions having other types."

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Meanwhile, Crystal and Sophie were currently shopping for a large amount of adamantite. With the recent war, not only did we force the US government to pay us significant war reparations, granting us a huge supply for the time being, but we also confiscated a lot of it from the soldiers killed. The number of bullets made of adamantite was not small, and naturally, it was melted down to make something else. I collected a lot of it and also purchased a lot of mithril. Naturally, this was all in preparation to build the golem body for my fairy familiar.

After purchasing all of the materials I needed, I headed back home and entered one of the crafting rooms in my house. I was not very skilled at crafting, even with using magic to help me. If I wanted to make a functional golem, I probably couldn't, but I just needed to make a sturdy body for the fairy to possess. Hence, it didn't actually need to be a functional golem.

I started by mixing the adamantite and mithril together to form an alloy. I then used magic to shape it in the form of a human skeleton. I took out a pen from my storage ring; this was an enchanting pen. I began writing runes into the air. These runes were defensive enchantments and, of course, auto-repair enchantments. I started with a classic energy dispersal rune, which would allow the skeleton to disperse both magical and kinetic energies. Then, I added a second layer designed to increase the durability and, finally, an auto-repair layer. This process took several hours and had to be redone several times.