A tier 6 was something only a few individuals could cast, especially with such ease as Arthur. Myria was breathing heavily after seeing that, but imagine if she knew about the tier 7 spell Arthur cast during that battle.
Anyway, with that the fire golem problem was solved, but who knows what types of dangers still lurked in the shadows of that dungeon floor?
Arthur went to where Myria and Lilia where. "Stay here while I check the rest of the floor. If anything bad happens, return using the mirror."
He left afterwards, flying towards the volcano that seemed to be the main part of that dungeon floor. The fire golems patrolled the area around the volcano before rushing towards him, which meant it held something of value, or someone important enough for them to protect it.