In the game Valoria Legends, the location of the Aberration Dungeon was never clearly mentioned. After the protagonist cleared it, the dungeon vanished, and can't be found again. The protagonist didn't even realize he was inside a dungeon until he reached the middle floors. It was only after escaping that he learned it had been hidden in the Dry Forest.
Normally, when Eren completes conquering a dungeon in the game, that dungeon can be accessed again, but will gives no rewards. But it only happens for pacific dungeons.
So now, Eren had no clue where the dungeon was—only that it had to be somewhere in this forest.
At first, he tried searching the System's Shop for items that could help him detect it—things like a magical mapping device, a scroll that could locate nearby dungeons, or even a magic map that auto-drew the terrain like in Minecraft.
But there was nothing useful. The shop only offered low-range scanners for enemies, monsters, and minerals.