Originally Posted by
BerzerkerUnit
So here’s a setting concept:
Dungeons are a kind of Architectural magic that anyone can do (martial or spell caster). The gods did it yadda yadda. You have to design the dungeon yourself but any number of people can help you build it. Once built is has to be stocked with monsters, though some will naturally come to it.
The monsters are basically a power source, their day to days slowly charging the magic of the place and their spilled blood becomes the trigger. So once you start conquering a dungeon, you can’t back out lest all the stored magic dissipate.
Some Dungeon spells are extraordinarily potent, being the equivalent to Tomes for ability scores or granting a bonus feat. Some might might be a means to place a powerful enchantment on an item.