ZEZ - This Is An Overlord Filler Episode - Unicorn Overlord Part 7 [Expert Mode]

I hang about and gather materials to fix up towns while trying to figure out more tactics on overworld and stage battles. When reaching the area just before where Scarlett is, we end up meeting a shaman by the name of Selvie-- part of the Ruins Excavation Team, who tasks us with beating up a ton of ghosts at training grounds created by sigils of power. [Played on Expert mode]