Required Mods:

Huge Structure Blocks: https://www.curseforge.com/minecraft/mc-mods/huge-structure-blocks

Structure Optimizer: https://www.curseforge.com/minecraft/mc-mods/structure-layout-optimizer

Dodge-Rolling Mod, like:

Epic Fight: https://www.curseforge.com/minecraft/mc-mods/epic-fight-mod undefined
or Combat Roll: https://www.curseforge.com/minecraft/mc-mods/combat-roll

recommended for Epic Fight:

WoM: https://www.curseforge.com/minecraft/mc-mods/weapons-of-miracles-epicfight
Reverie's WoM Tweaks: https://www.curseforge.com/minecraft/mc-mods/reveries-weapons-of-miracles-tweaks

Alex's Caves + Aether Version

Alex's Caves: https://www.curseforge.com/minecraft/mc-mods/alexs-caves

Aether: https://www.curseforge.com/minecraft/mc-mods/aether

Whisperwoods Version

Whisperwoods: https://www.curseforge.com/minecraft/mc-mods/whisperwoods

IMPORTANT:

for the combat roll mod, it is required to turn on i-frames (recommended: 15 ticks) inside the config file
for structures to generate correctly, you need to dedicate enough RAM, 6 GB worked for me
the "mod resources" resourcepack must be at the top of the list

If you want to use only the bosses inside a modpack, on a server etc. you can use Final Adversaries Lite: https://www.curseforge.com/minecraft/mc-mods/final-adversary-lite

This mod is heavily inspired by Elden Ring's gameplay. Immerse yourself in a small story revolving around the monk Netero, who has been sealed away. To free him, you must embark on a journey to new structures and NPCs and uncover what happened there. Along the way, you will encounter powerful bosses, each with complex, unique attacks and their own story. Defeat them and obtain their remembrances, which you can use to make their abilities your own.

If you enjoy the mod, please consider supporting me on Ko-fi :)

Recommended Mods:

Nature's Compass: https://www.curseforge.com/minecraft/mc-mods/natures-compass

Third-Person Mod: https://www.curseforge.com/minecraft/mc-mods/leawind-third-person

Atmosphere:

Weather, Storms & Tornadoes: https://www.curseforge.com/minecraft/mc-mods/weather-storms-tornadoes

Ambient Sounds: https://www.curseforge.com/minecraft/mc-mods/ambientsounds

Music Credit:

Dutonic: https://www.youtube.com/watch?v=nVoOzRhazbs

Solas Composer: https://www.youtube.com/@SolasComposer

Logic: https://www.youtube.com/@logic6615

Config:

settings:

-the most important NPC is Netero, who ist auto spawned the first time the mod is loaded (can also be spawned and despawned manually, inside settings)
-all settings are found with: /function final_adversaries:adjust_settings/...
-because the mod is a datapack under the hood, you can't find any items or spawn eggs inside the creative inventory

bosses:

-every boss has an own structure, which can be located with /locate structure final_adversaries:...
-to prevent a player to be teleported away from the Tree of Light use: /tag playername add tree_of_light_access
-if a boss has an empty healthbar or doesn't spawn at all, try this to fix it:

/function final_adversaries:adjust_settings/despawn_boss_number

/tag @e[type=marker,limit=1,sort=nearest,scores={boss_spawn=1..}] add f_a

incantations:

-you can change the applied cooldown for specific players in ticks (20 ticks = 1 second) with: /scoreboard players set playername incantation_cooldown_max number

structures:

-players in survival can't destroy and place blocks near structures, to not break their functionality

sounds:

-boss music = noteblocks/record
-boss sound effects = speech/voice