All pages belonging to this category should be about Biomes, such as the Forest, Jungle, or Dungeon. All events that do change overall gameplay should go to the Mode Category.
“This biome spawns once Skeletron Prime has been defeated with the message "The Portal has been...Mecha Biome
“All chests in floating islands now contain the Small Cloud, two of which, when crafted together...Cloud Biome
“This next idea is the new mode after hardmode: The WORLD'S END Mode. For World's End mode to...World's End Mode
“The Ruby is a Hallowed variant of the Crimson.Post ideas in the comments. It has a chance to...The Ruby