They are back

 Ryan expected to see an army of monsters waiting for him at the exit of the dungeon, but he didn't find anything. In order to prevent a fight against a boss and their underlings, Ryan decided to clear the next dungeons as fast as possible, but just when he was about to enter the Giant Skull's dungeon, Femradiel called him.

"We have a problem," Femradiel said. " An army of lizards are coming from the East."

"What?" Ryan asked in confusion.

 That timing was weird… Why would another party try to attack him at such a time? By the look of things, Ryan assumed the lizards weren't working with the dungeon masters that tried to take his domain, but Ryan was quite sure they were equally troublesome.

 When Ryan returned to his domain, he saw the army of lizards that Femradiel had said. He knew that army very well… They were the lizards he defeated before when he got his pair of two long fire swords. The same guy who gave the swords to him was leading the army.