Inferno.

In the dungeon, Ark was simply taking a look around when the sea of fire suddenly surged in front of him, and a creature condensed of blue flames suddenly charged straight at him. The creature was a kind of wisp. A creature that was known for being docile and weak, simply emitting a gentle heat like a candle flame. However, even wisps could grow to become strong, and this wisp in front of Ark was in the level 200 range, perhaps even stronger, which meant that it was naturally stronger than most monsters that adventurers could handle. Combined with the heat of the sea of fire, the attack of the wisp was pretty devastating.