Martian Probe

The Martian Probe is a rare Hardmode, post-Golem flying enemy that can spawn anywhere on the surface and space layers (but not near the center of the map). It flies through blocks. The Martian Probe initially appears with a green light. When it spots the player, the light turns red, and it attempts to escape. If allowed to escape, it initiates the Martian Madness event.

It is one of the few enemies that can be detected by the Lifeform Analyzer.

History
Sonde Martienne