Yes, Judar "Raises" Dungeon, they don't occur on their own as far as I'm aware.

I don't think they do possess us, a Djinn-equip is like donning magic armor. It makes us similar to them in appearance and power but ends when the equip is removed or Magoi drops too low.


.... He does as I ask most of the time.

[That's Judar in a nutshell. Hakuryuu doesn't really care.]