The Conversion Event

During The Conversion Event, Crimson and Corruption enemies will spawn.

30% through the event, the Lunatic Cultist will spawn.

60% through the event, clones of you will spawn.

80% throught the event, Corrison Slimes will spawn.

After the event, your worlds evil biome will convert to the opposite evil biome.

Example: Crimson becomes Corruption and Corruption becomes Crimson.