Small Holoboard小さなホロボード

A vertical panel made from blue glass. The flickering glyphs on it almost appear like a city map.
In-game description

How to get Small Holoboard

Placed inside dungeons or scenes (buildings, ruins and so on); break it or pick it up to get itPlaced in: City Garden [Sunken City], City Bath [Sunken City], City Harbor [Sunken City], City Entrance [Sunken City], City Games Room [Sunken City], Research Lab [The Sunken Sea], Small Forlorn Metropolis [The Sunken Sea], Large Forlorn Metropolis

Scene containers, dungeon placements, guaranteed drops and natural spawns are based on the Obtaining data of the Core Keeper Wiki (Fandom) (CC BY-SA 3.0), because these are not in the game files this site reads. Scene names are the wiki's English names.