Exetreme Mode

Exetreme mode is a harder version of your world which is activated after all Hardmode bosses are defeated. It has harder enemies and adds a new biome.

Bosses
King Slimer:

(Info coming soon)

Queen Crimslime:

(Info coming soon)

Duke Fish-a-Tron:

(Info coming soon)

Trivia

 * The message when defeating the Moon Lord says you have started a war you cannot end, possibly referencing War Mode, another fandom third mode.