The Mirror Domain!
Dox froze for a moment, then snapped back to himself: Right, how could he be so blind under his own lamp and forget about the Mirror Domain?
The Mirror Domain could actually be considered a special kind of world, and there were definitely plenty of powerful creatures in it. For example, that Laplace from before would count as one.
By using her ability to shuttle between reality and the Mirror Domain, Adanis had subdued You Nu, and she could certainly subdue more Magical Creatures longing for the outside world. There would definitely be no shortage of powerful ones among them.
So Adanis sending out some powerhouse from the Mirror Domain to deal with them was completely reasonable.
Thinking about it now, things like the Lofte World or the Abyss could all be bumped down the list; the Mirror Domain was absolutely the most likely!
