Martian Probe

The Martian Probe is a rare Hardmode Post-Plantera Enemy that can spawn anywhere on the surface after you defeat Golem. When a Martian Probe gets near a Player or gets damaged it will turn red and start to fly away, going through blocks. If the Probe escapes off screen it will summon a Martian Invasion. But, if you kill it, it will not summon an invasion.