After the masked man from Black Rose fled, Lucy went to check if Arthur was safe before continuing to wander around the secret Realm.
The monsters lurking in the inner area of the valleys were quite strong but Lucy just incinerated them before they even got to attack or move a muscle. Despite having to carry Arthur around with the use of the nine lotuses, her speed was alarming, like a shooting star which flew from one place to another.
The cultivators who witnessed this was dumbstruck, shrunk their necks and didn't dare block her path for fear of meeting the same fate as the monsters.
Lucy wanted to find the entrance to Timos' small world, where the Dark Blade is located. She used the black flames covering Arthur to see if she's either further or close to the destination.