Jimmysla
Terrarian
After the defeat of the lunar boss I think the player should enter expert mode by the message (the aliens want to take revenge). The enemies should be alien based and the bosses too. First boss <The controller> (It can be a mechanical brain of cthulhu) it will spawn with the mechanical heart. Second boss can be the Alien King it will spawn with the Alien Crown. Third can be Spider Queen it will spawn with the spider egg. At night there will be no moon and blood moon or solar eclipse, instead one of the pre-hardmode bosses or hardmode will spawn. There will be one event the Alien Army, it will spawn with the moon star. Thanks for reading!