"Have you heard of the Skill known as [Spell Crafting]?" Cain asks, wondering how far back in the story he is going to have to start.
"Is that some form of Inscription? Or enchantment?" The Tengu asks, writing his notes.
"Neither, or perhaps both. Spell Crafting is the core skill to create and modify magical spells and System abilities. With it, you learn to modify the rune patterns that make up a spell, or an enchantment, which is the relevant bit today.
The edges of the enchantment that should have created dungeons here in the Awakened Zone tore, and pieces were lost entirely. I suspect it has to do with the relative power of the residents against the Ley Lines in some way, but I haven't had time to properly explore that yet.