They are very similar to square-shaped beings (not exactly a square), with arms and legs that appear when they are needed. Likely appendages. The entire body of the thieves are black colored, except for their large cartoon-like eyes. They want to steal gold and gems from the player’s dungeons. How to stop them? Just upgrade traps in the dungeon. They don’t have mouths (therefore cannot speak), they can only express themselves through their large cartoon eyes. Not at all related to humans.