Slime Rain

Slime Rain is a minor event that consists of frequent spawns of Green, Blue and Purple Slimes, most of which fall from the sky. This rain continues until 150 slimes have been defeated, at which point King Slime will spawn; if King Slime has previously been defeated, he will spawn after only 75 kills. The event ends shortly after he is defeated. This event can happen simultaneously to a Blood Moon, the two series of monsters spawning together.

Upon completing the event, the player receives the Sticky Situation achievement.

The event can also end after enough time has passed, however King Slime won't spawn, and the Sticky Situation achievement will not be received.

History
Pluie de Slime