Deservioli
Terrarian
So after moon lord there not many difficult bosses to defeat. And its also after moon lord you get the best weapons with nothing to use them on. Thats why adding a special moon lord boss fight that can be spawned when using a celestial sigl during an eclipse. This will spawn an enraged moon lord or smt. He would be red instead of blue since hes so angry. One of his attacks would be like the lunar portal staff so that some of them spawn around you. Another attack would be like the lunar flare item. Them will like shoot after you. He would also ofc have his previous attacks and if someone comes up with something more they could also be attacks.