Nuclear Toad

The Nuclear Toad is a Pre-Hardmode enemy that spawns during the Acid Rain event. They are stationary, and when near the player will explode into goo. The explosion radius depends on what tier of the Acid Rain event the player is currently on. The radius is roughly 12 blocks for Tier 1, 18.5 blocks for Tier 2 and 29 blocks for Tier 3.

Trivia

 * The Nuclear Toad's throat glows a bright lime-green color during the Acid Rain event.