Radiator

The Radiator is a Pre-Hardmode enemy that spawns during the Acid Rain event. It slowly crawls around the sides of tiles much like a Snail, and emits an aura around it that inflicts Irradiated and Poisoned onto the player. After defeating Polterghast, the aura will additionally inflict Sulphuric Poisoning and Venom.

There's a 5% chance for a Radiator to be spawned with brighter green glow compared to normal ones. These Radiators will drop a Radiating Crystal when hit with a Bug Net or Golden Bug Net.