Adds lots of new things and improvements such as overhauled vanilla bossfights (Wither: Reincarnated, True Ending), creatures (Ice and Fire, Alex's mobs), food (Farmer's Delight + couple of addons, Croptopia), hats (Simple Hats), biomes (Terralith, Biomes O' Plenty), structures (Repurposed Structures, Structures/Structures+, etc.), and a little bit of difficulty (Cold Sweat, Thirst Was Taken, Champions, etc.)