Secret Source Scout Sweeper

A nimble, fish-like mechanical construct reminiscent of the technology in ancient ruins. It can move in various liquid environments, including liquid Phlogiston — perhaps it was designed to detect and automatically approach heat sources.

Due to this "heat-seeking" trait, skilled fishers can use heat-emitting bait to lure and capture them. When disassembled, they yield remarkable components from ancient civilizations, making these "mechanical fish" highly valuable...