Incendium Structures¶

Incendium adds 9 structures to the Nether, ranging from small encounters to sprawling multi-floor dungeon complexes. This page provides step-by-step walkthroughs, loot highlights, and survival tips for each one.

Forbidden Castle¶

Location: Ash Barrens

The Forbidden Castle is the most complex jigsaw structure in Minecraft, assembled from 227 unique jigsaw pieces. No two castles are identical — the layout is procedurally generated each time, creating a unique dungeon experience in every world.

What to Expect¶

The castle is enormous. Dozens of distinct room types make up its interior, including:

Armories stocked with weapon racks and loot chests
Libraries filled with bookshelves and enchanting setups
Laboratories with brewing stands and potion ingredients
Throne rooms with elevated platforms and high-value loot
Crypts beneath the main floors, dark and heavily guarded
Corridors, stairwells, and balconies connecting everything in unpredictable configurations

Enemies¶

The castle is garrisoned by custom Piglin variants, each with distinct combat roles:

Piglin Scouts — lightly armored, fast, patrol outer areas
Piglin Archers — ranged attackers positioned on balconies and towers
Piglin Knights — heavily armored melee fighters, the backbone of the garrison
Piglin Paratroopers — drop from above, often catching you off-guard
Piglin Alchemists — throw harmful potions
Piglin Pyromancers — fire-based attacks with area denial
Piglin Blacksmiths — tough melee fighters found in armory rooms

Do Not Rush

The Forbidden Castle is not a structure you clear in one pass. The jigsaw generation means rooms connect in unexpected ways, and Piglin ambushes can come from corridors you did not know existed. Move slowly, light rooms as you clear them, and mark dead ends.

Systematic Clearing

Pick a direction and stick to it. Clear each room fully before moving on, and block off corridors behind you to prevent mobs from flanking. Place torches or other markers at intersections so you can find your way back.

Key Loot¶

The Forbidden Castle contains some of Incendium's best weapons and items, distributed across its many chests:

Blazing Hatchet — fire-aspected axe
Chilling Blade — sword with slowing effects
Greatsword of Sacrifice — powerful blade with a health cost
Withersbane — effective against undead and Wither-type enemies
Voltaic Trident — lightning-enhanced trident
Scarlet Dagger — fast-attacking dagger
Sentry's Wrath — ranged weapon carried by Pipeline Sentries
Multiplex Crossbow — crossbow with unique properties
Hefty Pickaxe — mining tool with enhanced block-breaking
Various potions including rare and custom brews

Loot Strategy

Not every room has a chest, and not every chest has a unique item. The highest-value loot tends to spawn in throne rooms, crypts, and armories. Libraries often contain enchanted books instead of weapons. If you are hunting a specific item, expect to explore a large portion of the castle.

Sanctum¶

Location: Quartz Flats

The Sanctum is a massive quartz church built by Illagers on top of a destroyed Bastion Remnant. It is one of Incendium's most dangerous and mechanically complex structures, with environmental curses, multi-floor exploration, puzzle mechanics, and numerous traps.

Step 1: Dealing with Mining Fatigue¶

Mining Fatigue Curse

Upon entering the Sanctum, you are afflicted with Mining Fatigue, which drastically slows your block-breaking speed. This curse persists until you defeat all 3 Sanctum Guardians stationed throughout the structure. Do not try to mine your way through walls — it will take forever. Use the doors and corridors as intended.

Step 2: Main Floor — The Church¶

The main floor is a grand church interior with bells, towers, and stained-glass windows. Sanctum Cultists, Ritualists, and Inquisitors patrol the nave and side aisles. Clear the main hall first, then explore the towers for elevated loot chests and vantage points.

Sanctum Guardians

The 3 Sanctum Guardians are distributed across the structure's floors. Killing each one weakens the Mining Fatigue curse. Kill all three to remove it entirely. Prioritize finding and defeating them early — the curse makes the entire dungeon harder than it needs to be.

Step 3: The Basement¶

Descend below the church to find the operational heart of the Sanctum:

War Table — a strategic planning area with maps and loot
Daybreaker Maze — a labyrinthine section where the floor can collapse beneath you without warning. Move carefully and listen for cracking sounds.
Coffin Fireball Trap — a corridor lined with coffins that launch fireballs when you pass. Sprint through or block with a shield.
Ravager Storage — a holding area for Ravagers. Opening the wrong door releases them into the corridor. Proceed with caution.
Torture Room — a grim chamber with loot chests
Overworld Portal — a non-functional portal to the Overworld, hinting at the Illagers' origins

Floor Collapse in the Daybreaker Maze

The collapsing floor sections in the Daybreaker Maze drop you into lower chambers, often directly into enemy groups. Watch the blocks beneath your feet — cracked or differently textured blocks indicate a collapse point. You can also bridge over suspicious sections with your own blocks.

Step 4: The Mausoleum¶

The deepest level of the Sanctum holds its most valuable loot and its most devious traps:

Infinite Corridor Trap — a hallway that appears to loop endlessly. This is an illusion — look for subtle differences in the walls to find the exit. Breaking the loop requires observation, not brute force.
Hidden Crypt — behind the infinite corridor lies a crypt sealed with an item-frame lock puzzle. You must place the correct items in the correct frames to unlock the crypt door. Clues are found in the rooms you have already explored — pay attention to item placements and wall decorations throughout the Sanctum.

Item-Frame Lock Hint

The items needed for the lock puzzle are found elsewhere in the Sanctum. Look carefully at decorative item frames on the upper floors — they often display the items you need, and their arrangement hints at the correct order for the lock.

Key Loot¶

Daybreaker — powerful weapon found in or near the maze named after it
Ragnarok — devastating endgame weapon
Holy Wrath — sacred weapon effective against undead
Scroll of Returning — teleportation item that returns you to your spawn point
Death Potion — an extremely rare potion that inflicts every negative status effect simultaneously

Infernal Altar¶

Location: Infernal Dunes

The Infernal Altar is a large domed structure whose interior contains miniature representations of each Nether biome — a kind of Nether in microcosm. It serves primarily as the summoning arena for the Hovering Inferno, Incendium's final boss.

How to Summon the Boss¶

Obtain a Nether Star (dropped by the Wither).
Enter the Infernal Altar and locate the lectern at the center of the dome.
Throw the Nether Star onto the lectern (drop the item on it — do not place it by right-clicking).
The Hovering Inferno spawns and the fight begins.

Re-Summonable

The Hovering Inferno can be summoned as many times as you want, provided you have a Nether Star each time. This means you can farm its drops or re-attempt the fight after a defeat without losing access to it permanently.

Prepare Before Summoning

The arena inside the Altar is the battlefield. Clear any remaining mobs from the area before throwing the Nether Star. See the Hovering Inferno Boss page for a full strategy guide.

Nether Reactor¶

Location: Toxic Heap

The Nether Reactor is the source of the Toxic Heap's pollution — a structure that has been leaking toxic waste into the surrounding biome. It is a moderately sized facility guarded by the Radiation Director, a powerful custom boss mob.

Approach¶

Clear the Toxic Slimes from the surrounding area first. Fighting the Radiation Director while dodging slime splits is extremely dangerous.
Approach the Reactor carefully — the structure itself may have environmental hazards near its entrance.
The Radiation Director patrols the interior. It is a tough fight with high damage output.

Radiation Shield

If you have obtained a Radiation Shield from elsewhere, equip it before entering. It mitigates some of the environmental effects inside the Reactor.

Toxic Slimes

Toxic Slimes in the surrounding area leave poison clouds when they split. Clear a wide perimeter before engaging the Reactor's interior.

Abandoned Tower¶

Location: Quartz Flats

Abandoned Towers are small, vertical structures scattered across the Quartz Flats. Their primary appeal is the Ghastling trapped inside each one — a baby Ghast that you can rescue and keep as a pet companion.

Rescuing a Ghastling¶

Locate an Abandoned Tower in the Quartz Flats. They are small stone towers, usually visible from a moderate distance.
Clear any hostile mobs around the base.
Enter the tower and climb to the top.
Free the Ghastling inside. Once released, it will begin following you.

Ghastling Companions

Ghastlings are loyal companions that follow you through the Nether. They will attack Ghasts on your behalf and can have their feeding toggled on or off. They are one of Incendium's most unique features — do not skip the Abandoned Towers if you see them.

Quartz Kitchen¶

Location: Quartz Flats

The Quartz Kitchen is a small structure guarded by Torte, a skeleton chef who does not take kindly to intruders. Expect a fight when you enter — Torte is a unique named mob with custom behavior and dialogue.

Defeating Torte

Torte is a single enemy, but do not underestimate a skeleton with a grudge. Bring a shield to block ranged attacks and close the distance quickly for melee. The kitchen contains food-related loot and some unique consumable items.

Piglin Village¶

Location: Various biomes

The Piglin Village is a 42-piece jigsaw village populated by passive Piglin NPCs. Unlike the hostile Piglins found in castles and bastions, these villagers are non-aggressive and go about their daily routines.

Do Not Provoke

The Piglin villagers are passive by default, but attacking one or opening certain containers may turn them hostile. Treat it like an Overworld village — look, trade if possible, and do not start fights.

Safe Haven

Piglin Villages are one of the few safe places in Incendium's Nether. Use them as landmarks and rest stops during long exploration trips. The village's structures often contain useful supplies.

Jigsaw Generation

With 42 unique jigsaw pieces, Piglin Villages vary significantly in layout. Some may be small clusters of huts, while others sprawl into larger settlements with multiple buildings and features.

Pipeline¶

Location: Various biomes

The Pipeline is an industrial pipe facility that stretches through the Nether. It is guarded by Prime Sentries, custom mobs that are notably dangerous because they carry Totems of Undying — meaning they survive a killing blow once before going down for good.

Clearing the Pipeline¶

Approach cautiously. Prime Sentries have ranged attacks and patrol in groups.
Focus fire on one Sentry at a time. Remember that each one has a Totem of Undying — the first time you bring one to zero health, it will revive. Be ready for the second wind.
The Pipeline's interior contains industrial loot and some unique items.

Totems of Undying

Every Prime Sentry carries a Totem of Undying. This means you effectively need to kill each one twice. Do not assume a Sentry is dead after the first kill — wait for the Totem animation to finish and engage again immediately.

Totem Farming

Since Prime Sentries carry Totems of Undying, the Pipeline is a reliable source of Totems if you need them. The fights are tough, but the reward is one of Minecraft's most valuable survival items.

Ruined Lab¶

Location: Withered Forest

The Ruined Lab is a spherical laboratory partially embedded in the terrain of the Withered Forest. Inside, buffed Wither Skeletons patrol the corridors — these are significantly stronger than their vanilla counterparts, with increased health and damage.

Clearing the Lab¶

Bring a Smite-enchanted weapon — the buffed Wither Skeletons are undead and take bonus damage from Smite.
The spherical layout means corridors curve unexpectedly. Check around corners before advancing.
Loot chests are distributed throughout the interior, often in side rooms off the main corridor.

Buffed Wither Skeletons

These are not vanilla Wither Skeletons. They deal substantially more damage and have higher health pools. Full diamond armor or better is recommended. Bring milk or golden apples to counter the Wither effect they inflict.

Wither Skulls

The buffed Wither Skeletons in the Ruined Lab may have improved Wither Skull drop rates compared to their vanilla counterparts. If you are farming skulls to summon the Wither (and subsequently obtain Nether Stars for the Hovering Inferno), the Ruined Lab is worth revisiting.