Martian Probe

The Martian Probe is a rare Hardmode, post-Golem flying enemy that can spawn anywhere on the surface and space layers. It flies through blocks. The Martian Probe initially appears with a blue 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.

Known bug

 * As of 1.3.0.4, the Martian Probe is unable to spawn when the Cultists are present near the Mysterious Tablet because they are considered to be a boss. To resolve the problem, the player has to summon the Lunatic Cultist and then die, use the Magic Mirror or run away. The Cultists will no longer be near the Mysterious Tablet which enables the Martian Probe to spawn until the next day.