The Twin Towers Kingdom got its name from the two ancient towers within its borders.
These two ancient towers had existed in God's Domain for so long that their age could no longer be verified.
One of them was the Time-Space Tower, also the Twin Towers Kingdom's only large-scale regional dungeon. Its difficulty was set at the Asura Level, just like the Stoneclaw Mountain Range, except the Time-Space Tower had a higher level requirement and was even harder to conquer.
The Time-Space Tower was famous throughout God's Domain Continent for the same reason as the Stoneclaw Mountain Range: not only did it produce Magic Crystals in abundance, but killing the Bosses inside also gave players a certain chance of obtaining Seven Luminaries Crystals.
Simply entering the Time-Space Tower required a player to reach Level 50.
Back when mainstream players were only in their fifties and the Main God System had yet to activate the Mental Space System, everyone treated the Time-Space Tower as an ordinary regional dungeon that produced Magic Crystals. Even when they killed the many Bosses in the dungeon and obtained Seven Luminaries Crystals, they had no idea of their true value.
The various large Guilds merely used and traded Seven Luminaries Crystals as premium Magic Crystals. Only after the Mental Space System appeared did every major Guild that had acquired Seven Luminaries Crystals regret it so bitterly that they nearly vomited blood.
Regional dungeons had level restrictions. Those below the required level or above it could not enter. By then, God's Domain had been open for over a year, and players had long surpassed the Level 70 upper limit. Trying to have a Guild's main force repeatedly farm Bosses for Seven Luminaries Crystals was simply impossible.
Besides the level restriction, entering the Time-Space Tower also required a