Yes, Annan had realized it.
The waters of "Nightmare: Gallery" were much deeper than he had initially thought.
Not to mention other things.
Annan had just learned that saying "Skeleton Lord" in Frostwater Harbor and receiving the reply "I am listening" was because the Skeleton Lord was indeed always listening!
To have a deity squatting in such a remote and desolate place, staying for decades... If it were just an ordinary nightmare, Annan would never believe it.
Rather than fleeing... it's better to confront the enemy head-on.
Taking advantage of the fact that he held the Skeleton Lord's true name, which made it temporarily impossible for him to kill Annan, Annan needed to quickly collect the "evidence of guilt" against the Skeleton Lord. At the very least, he should have capital for negotiation...
——But first, he should speedrun the second level.