Xaviers random stuff (XRS) is a mod heavily inspired by wheaten eye's "wheat death of the universe" mod(which you should check out btw that mod is PEAK!) that makes the player spawn in a new dimension upon joining/creating a new world(and makes the player respawn in it) so it isn't really recommended to add this mod to an existing modpack.
slightly changed progression
there are currently
-4 new biomes
-2 bosses (technically 4 if you count the concept boss and the nightcrawler, both of which are unfinished)
2 new ores that are replacements for iron and diamonds
-alot of new blocks and items
-a few structures
If you don't like kaiju paradise and other stuff then I don't recommend playing this mod cuz there are some stuff here from that game
adds some stuff from kaiju paradise like hazzy and nightcrawler but idk what to make the hazzy do plus I haven't added the hazmat hostile variant with the weapon yty.