Bilgecraft

This mod adds new biomes with their own structures creatures. You can gather special loot to progress and fight a new final boss monster in a brand new dimension. This mod is designed for 1.17.1 and at times causes lag due to changes in generation (mainly in multiplayer servers).

There are in total 

-19 new mobs

-1 new Dimension

-5 biomes (4 overworld, 1 in new dimension)

-4 new weapons

-1 special ore

-14 new structures 

-1 new music disc

-1 new potion type and brewing recipe

-2 new armor pieces 

-7 crafting recipes