The Crude Forest is a biome made up of Coarse dirt... but it includes two new blocks, new boss, trades, and tools and armor
The Earsplitter Boss is a force to be reckoned with having 200 health points and a weapon that can one-shot netherite armor
But don't worry about him yet, you shouldn't have to deal with him often as he spawns quite rarely There are two new blocks in the game: Crudestone, and True Void
Both Crudestone and True Void make armor sets, but I wouldn't recommend trying to mine True Void until you obtain the crudestone pickaxe