Remnant Bosses

Born from the depths of the underworld, Remnants introduces cinematic boss encounters, dangerous undead creatures, and fast-paced combat designed to challenge even the most experienced adventurers. Featuring custom AI, animations, models, textures, sound effects, and music, every battle feels unique and memorable.

Remnant Bosses adds animated boss fights, remnant mobs, legendary weapons, and altar rituals for Minecraft 1.20.1 (Forge + Fabric) and 1.21.1 (NeoForge + Fabric).

Bosses

Boss	Title	Summon item (default)
Ossukage	Oni Shogun	Nether Star
Kotsukage	Bone Sovereign	Wither Skeleton Skull
Umbrakar	Riftmaw Colossus	Echo Shard

Each boss has a boss bar, multi-phase combat, custom GeckoLib animations, and JAuml-tunable stats. Spawn eggs are available in the Remnant Bosses creative tab for testing.

How to summon a boss

All three bosses use the same Ancient Altar layout. Requirements and pedestal blocks differ per boss (see table below).

1. Craft the ritual blocks

Block	Recipe
Ancient Altar (×1)	3× Chiseled Deepslate across the top row, 1× Diamond in the center, 2× Emerald on the bottom corners
Ancient Pedestal (×4)	1× Emerald on top, 1× Chiseled Deepslate in the middle, 3× Chiseled Deepslate along the bottom row

Recipes are shaped crafting; see JEI/REI in-game.

2. Build the ritual

Place one Ancient Altar and four Ancient Pedestals three blocks away on the four cardinal sides. On top of each pedestal, place the boss-specific activation block (one block above the pedestal).

Top-down layout (activation blocks shown; A = altar, P = pedestal):

        [pedestal 4 / north]
               |
[pedestal 2]—[ altar ]—[pedestal 1 / east]
               |
        [pedestal 3 / south]

• Pedestal 1 — 3 blocks east of the altar (+X)
• Pedestal 2 — 3 blocks west of the altar (-X)
• Pedestal 3 — 3 blocks south of the altar (+Z)
• Pedestal 4 — 3 blocks north of the altar (-Z)

All pedestals must be Ancient Pedestal blocks. The blocks on top must match the config for that boss exactly.

3. Activate

Hold the boss activation item in your main hand and right-click the Ancient Altar.

• The activation item is consumed (survival/adventure; creative is free).
• Lightning strikes each pedestal top; the offering blocks are destroyed.
• After a short delay (~4 seconds), the boss spawns on the altar.
• Ossukage also spawns remnant skeleton minions (default: 2; configurable).

Default pedestal offerings

Boss	Activation item	Pedestal 1 (east)	Pedestal 2 (west)	Pedestal 3 (south)	Pedestal 4 (north)
Ossukage	Nether Star	Skeleton Skull	Skeleton Skull	Skeleton Skull	Skeleton Skull
Kotsukage	Wither Skeleton Skull	Bone Block	Soul Sand	Soul Soil	Nether Wart Block
Umbrakar	Echo Shard	Amethyst Block	Crying Obsidian	End Stone	Sculk

Registry IDs for pack makers:

Boss	Config file	portal_activation_item	pedestal_*_activation_block
Ossukage	remnant/bosses/ossukage_summon	minecraft:nether_star	minecraft:skeleton_skull (all four)
Kotsukage	remnant/bosses/kotsukage_summon	minecraft:wither_skeleton_skull	minecraft:bone_block, minecraft:soul_sand, minecraft:soul_soil, minecraft:nether_wart_block
Umbrakar	remnant/bosses/umbrakar_summon	minecraft:echo_shard	minecraft:amethyst_block, minecraft:crying_obsidian, minecraft:end_stone, minecraft:sculk

Configs are generated by JAuml on first launch under your instance's JAuml config folder. Change any activation item or pedestal block without recompiling the mod.

Entity IDs (commands / datapacks)

Bosses register under the remnants namespace:

/summon remnants:ossukage
/summon remnants:kotsukage
/summon remnants:umbrakar

Legacy remnant_bosses:* IDs are aliased where applicable.

Requirements

• GeckoLib (required)
• JAuml 2.1.1 (required at runtime; generates and loads configs)

More documentation

• GitHub README: summoning guide
• Umbrakar combat notes: docs/umbrakar-rework.md

Features

Feature	Description
Cinematic Boss Battles	Multi-phase encounters built around unique attack patterns and combat mechanics
Custom AI	Enemies use specialized AI designed for fast-paced and unpredictable combat
Custom Animations	Bosses and creatures feature fully animated attacks, movement, and abilities
Custom Models & Textures	Unique visual designs created specifically for Remnants
Original Audio	Immersive sound effects and original boss music enhance each encounter
Dungeon & Adventure Ready	Designed for dungeons, adventure maps, and late-game progression
Minion Encounters	Bosses can summon or fight alongside undead followers
Mutated Creatures	Additional hostile creatures make exploration dangerous before major encounters

Remnant Ossukage

A mysterious skeletal shinobi who commands the battlefield with unmatched speed, deception, and deadly precision.

Abilities

• Shadow Dash — Performs a lightning-fast charge that pierces through players
• Kunai Barrage — Launches spinning kunai with custom flight animations
• Teleport Strike — Vanishes before reappearing behind unsuspecting victims
• Phase Shift Mode — Enters an enraged state with faster attacks and new combat patterns

Fight Experience

• Multi-phase boss encounter
• Custom AI and attack patterns
• Fully animated models and textures
• Immersive sound effects and original boss music
• Designed for dungeons, adventure maps, and late-game progression

Skeleton Minions

The Ossukage is never alone. His undead followers constantly pressure players throughout the battle.

Combat Roles

• Melee Fighters — Fast-moving skeleton warriors
• Guardian Minions — Protect the boss during vulnerable phases
• Wave Summons — Reinforcements appear as the fight progresses

Mutated Rats

The ruins are infested with mutated rats, ensuring danger long before the boss encounter begins.

Variants

• Default Rat
• Grey Rat
• Yellow Rat
• Blue Rat

Showcase

Community & Support

• Discord: https://discord.gg/TJc3CxR4jK
• GitHub Sponsors: https://github.com/sponsors/MeherBenSalem
• Documentation: https://nightbeam.gitbook.io/remnants
• Website: https://nightbeam.dev
• Store: https://nightbeam.dev/store
• CurseForge: https://www.curseforge.com/members/nightbeamstudio/projects
• Modrinth: https://modrinth.com/organization/nightbeam

If you encounter a bug or have a feature request, please open an issue or join the Discord community.

License

Remnant Bosses is licensed under the Apache License 2.0.

You are free to use, modify, and redistribute Remnant Bosses in accordance with the terms of the Apache License 2.0.

Feel free to include Remnant Bosses in modpacks