UPDATE 1.6.5: THIS IS NOW A STABLE VERSION 

• Removed Luminous Nether and My Nether's Delight - (because Major compat issues with other mods)
• Added Jaden's Delight for NetherExp
• Buffed all netherexp mobs
• Removed Tendon Lump artifact (it was buggy)
• You can now detect unexplored structures with the compass (once the compass finds a structure make sure to note the coordinates somewhere, on the next find of the same structure you will encounter another one)
• lower spawnrate for seagulls
• ADDED END VILLAGER TRADER
• Added sed parties config for new bosses
• added companions spawning in some terralith biomes
• tweaked quark's settings
• New Cataclysm music
• disabled short grass from project vibrant journey

As always, backup your world and save the options.txt file from the modpack!

Here is what the version 1.6 of the modpack brings:

1. Smoothen Terramity progression, now you do not need to craft all pickaxes.
2. Added bosses to Chapter 1 and Chapter 2.
3. Overhauled many quests! Especially the New Horizon Chapter.
4. Updated ETF, ETM, Fresh Animations.
5. Removed Fresh Animations ADDONS that were not updated.
6. Added Darker Depths mod, enhances the caves even further beyond. Added netherite template and enderium template to bosses reward.
7.  A brand new Wyvern boss that is very powerful.
8.  Increase the distance between structures, from 1.3 to 1.4
9. New crafting receipes to Nature Compass and Structure Compass
10. Added CLASSES MANUAL. Choose your origin.
11. Updated other mods & fixed bugs.