I'm pretty sure I got rid of all the glitches but if not, my bad.
I added a handful of new mobs as well as structures.
There are new dimensions as well
"New Nether"
"LTN"
"Biome2"
"Turd Dimension"
There is a quest line in addition to all the regular vanilla stuff.
There is a starter chest that spawns on a small pillar at world spawn.
This has the instructions for the quest.
if you spawn in a forest the chest can spawn on top of a tree.
There are 4 quest items to get and you craft them together to get the final one.
The final quest item requires a button or switch and when you activate it you will be teleported to the final boss.
Only place the final quest item "teleport" once and only use the button once or it could spawn extra final bosses.
The Boss rooms/Dungeons are giant black cubes with the exception of the final boss room.
I can't say anything else without spoiling the mod so, thanks and have fun!