ModsJava
Corrupted Vile Expansion Mod (1.20.1) – Summon and Battle the Undead Skeleton
Java mod listed for Minecraft 1.20. Downloads from the MC Java Mods app on Android.
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Corrupted Vile Expansion Mod extends Defiled Lands with a new undead boss and its skeleton army. This mod brings a two-phase boss battle alongside three minion types that spawn in dangerous biomes. Players can craft summoning items to challenge the king at an altar and earn rare crafting materials alongside a heavy blade.
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Features:
- Adds the Skeleton King, a summonable two-phase undead boss with special combat mechanics and custom animations.
- Introduces three skeleton minion variants that assist the boss and roam hostile biomes.
- Spawns minions naturally in Defiled biomes as well as Nether Soul Sand Valleys.
- Brings the Skeleton King’s Blade, a slow and heavy weapon that inflicts Vulnerability on hit.
- Provides the Royal Skull item used to trigger the boss fight at active Conjuring Altars.
- Boss drops include bones, Umbrium Ingots, Scarlite, and guaranteed weapon drops.
Skeleton King Boss:
- Spawns only through manual summoning at an active Conjuring Altar.
- Features full immunity to fire, knockback, fall damage, and damage from other undead mobs.
- Hovers above the ground and pursues targets upward if they try to build higher.
- Phase one uses wide sweeping melee cuts, charges that pass damage through blocks, teleport strikes, and minion summons.
- Phase two triggers below half health, giving the boss faster movement, reduced damage taken, melee lifesteal, magic damage immunity, and a defensive guard stance that counters incoming hits.
New Minion Mobs:
- Skeleton Warrior: A melee fighter with readable wind-up animations that allow timed dodges.
- Skeleton Archer: A ranged attacker that keeps distance and kites players while firing arrows.
- Skeleton Mage: A support mob that casts debuffing skulls, drops healing zones for undead allies, and teleports behind other skeletons when approached.
Items and Equipment:
- Royal Skull: A craftable summon item used by right-clicking an active Conjuring Altar.
- Skeleton King’s Blade: A fireproof heavy weapon dealing bonus damage against living targets and applying the Vulnerability effect.
How to Use:
- Craft a Royal Skull item using the required materials.
- Locate a Conjuring Altar and clear the two blocks directly above it so it becomes active.
- Right-click the top of the altar with the Royal Skull to summon the boss.
- Dodge the initial attacks during the invulnerability wind-up phase before attacking.
- Defeat both phases of the Skeleton King to collect the Skeleton King’s Blade and crafting resources.
Screenshots:




Corrupted Vile Expansion Mod Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Downloads as 504525.mcaddon
- Download size: 1.1 MB
- Download link checked 24 Sept 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.