New (mini) Bosses
Here you can see 3 new (mini) bosses there are going to be a lot more
Nether OverHaul
it's the nether but than better
New Biomes
Here are 9 new biomes
New Caves
They are Structures
New Blocks
There are new blocks
better cave decorations
here you can see most of the decorated caves
New Mobs
There are a lot of new mobs