Toxic rain

It have a chance of happening in hard mode instead of rain Also It will make a new biome it is the toxic biome and toxic ore will appear in your world

Enemies
daytime nighttime water
 * Goo Bat
 * Goo Zombie
 * Goo Slime
 * Toxic Zombie
 * Toxic Eye
 * Toxic Piranha

trivia
The reason it is called toxic rain instead of acid rain to fit with the theme of the enemies