Insomnia: Hardcore | Origins, Bosses, Skills

If updating an existing world to this version, be sure to delete the Nether dimension beforehand to avoid issues.

~ Revamped Nether terrain generation.
~ Added additional content to Nether and End dimensions.
~ Fixed mob health and damage being too high.
~ Fixed beds in Minecells dimensions being able to set respawn point.
~ Fixed phantoms spawning in the Overworld on servers.
~ Reworked the difficulty system to have a more sharp increase as you progress through dimensions and bosses.
~ Configured difficulty of many modded dungeons.
~ Fixed some crashing issues.
~ Replaced REI suite with EMI for improved compatibility.
~ Added more options for inventory expansion.
~ Re-added a few quality of life mods.
~ And probably more that i have forgotten to write down. ¯\_(ツ)_/¯

Full Changelog:

https://wiki.crismpack.net/modpacks/insomnia-hardcore/changelog/1.20#v2.1.0