Dungeon Spawn

In lands observing this Law, intelligent crystals with their own will and goals with the ability to terraform the area according to their own interests will spawn in neglected places with high mana concentration.
Law originates from Dungeon Life, but is also seen in Accidentally a Dungeon, I Reincarnated as a Magic Academy!, Dungeon Without a System, Blue Core, Greycore (one Viirin is writing), Perceptive Ambience (another one Viirin is writing), There Is No Epic Loot Here Only Puns, Lazy Dungeon Master, The Heart Grows, and This Dungeon Calls for a Sage.