You should play Angel Tale : The Midnight.
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All-in-one mod that improves performance, reduces memory usage, and fixes many bugs. Compatible with all your favorite performance mods!
Added a powerful cat-form boss to the game based on Goety.
Bloody Hell! features a blood dimension, also adds ores, tools, bosses, enemies, animals and also magic!.
Adds middle game and late game bosses to the base game
Mod-targeted optimizations that reduce memory usage and stutters, improve server/client performance, and fix bugs and crashes.
A mod that aims to add interesting boss-fights inspired by different characters.
A Cosmic Horror Story with Bosses, Dimensions, Magic, and more!
A client-side vanilla RPG style visual overhaul for FTB Quests, fully compatible with existing quests!
ALL-IN-ONE Japanese Translation
Quickly adjust spawn rate, ban bad mobs, change mob limit and more with in-game menu
A Goety addon featuring new bosses.
This mod has added a method to summon Apollon, as well as other related items.
This mod adds Herobrine boss and we can make tools and armors with boss reward, still WIP and more contents coming soon.
Adds enchantments that are based on games like MC Dungeons or DooM. And tweaks vanilla enchants.
Perform necromancy and dark rituals using the power of souls. Highly configurable.
A library mod that provides powerful entity manipulation APIs through CoreMod (ITransformationService), Java Agent, and Mixin technologies.
A mod that integrates content from Terraria into Minecraft, with the goal of creating a cohesive and fun combination of the two games.
Client-side addon for FTB Quests that adds a translate button to quest panels. Translates titles, subtitles and descriptions on-the-fly.
This mod adds content inspired by the fourth forms of the bosses in L_Ender's Cataclysm. (It is unofficial.)
Shrimp's Immersive Interfaces Add-on: This Texture Pack adds small details to some mods to fit more with Immersive Interfaces.