Fighting Against An Army Dark Formation

As for Arthur, he jumped over Birdy's back, while asking:

"Did you memorize all their locations?"

"Sure, they were trying to move out sneakily in small groups, but I noted their locations, or Birdy did and he told me," she laughed as she said what happened. Arthur took out his map, and handed it over to Lily as he said:

"We are here, where are the locations of these warriors?"

Lily wasn't that good at maps, but she tried to approximately mark the locations she spotted. Just as she was midway in her demonstration, Arthur figured out the full arrangement at once.

It wasn't a random dispatch of the warriors, but a formation! A dark formation he once saw before!

"Interesting," he sneered, as it was time for him to fight a formation head on. He wasn't worried, as any formation had only one weakness.