The erupting mountain caused the surrounding area to shake as if a giant were passing by. It created a lot of noise that drew a lot of attention to it.
Loki was very far away from the mountain, so the area he was in didn't shake as much. But he still noticed the erupting mountain, and he decided to check it out. This was because he saw a phantom giant appear on the mountain.
The phantom giant made him suspect that there was a warrior on the mountain. This warrior also seemed quite strong and should be at rank 5.
Since a warrior is a member of another sect, this makes them a potential source of merit points for him. It didn't matter to him if they were rank 4 or rank 5. What mattered to him was that killing them would earn him merit points, so he was determined to kill them.
With his mind made up, he stopped flying towards the nearest large city. He decided to rush towards the erupting mountain.
