Heavy Core
Heavy Core is the rare Ominous Vault drop in Trial Chambers, combined with a Breeze Rod to craft the Mace.
Description
Combining a Heavy Core with a Breeze Rod on a crafting table creates the Mace, a new weapon type introduced in version 1.21. The Mace has a fall-damage bonus mechanic: landing a hit immediately after dropping from a height multiplies damage based on how far the player fell, then resets the charge. This makes it devastating in aerial combat but situational in flat fights. Because the ingredient is rare and tied to active dungeon gameplay, the Mace is regarded as a prestige weapon that rewards exploration skill rather than resource grinding.
Java & Bedrock Guide
How to get Heavy Core and craft the Mace in Minecraft
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1
Trigger the Bad Omen effect
Drink an Ominous Bottle to gain Bad Omen, which converts the Trial Spawners inside a Trial Chamber into Ominous Trial Spawners.
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2
Complete an Ominous Trial
Defeat every wave of mobs from an Ominous Trial Spawner. Finishing the ominous trial rewards you with Ominous Trial Keys.
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3
Open an Ominous Vault
Use an Ominous Trial Key on a glowing Ominous Vault. Heavy Core is a rare reward, so open several Ominous Vaults to collect one.
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4
Craft the Mace
On a crafting table, place the Heavy Core in the center-top slot and a Breeze Rod directly below it to craft the Mace.
Heavy Core and the Mace were added in Minecraft 1.21 (Tricky Trials) for both Java and Bedrock Edition. Heavy Core appears only in ominous vault loot — normal Trial Vaults never contain it.
Used in crafts
Related blocks
Frequently asked questions
Can you craft a Heavy Core?
No. Heavy Core cannot be crafted, traded, or smelted. It only drops as a rare reward from Ominous Vaults inside Trial Chambers.
Where do you find Heavy Core in Minecraft?
Heavy Core is found in Ominous Vaults inside Trial Chambers, which you open with an Ominous Trial Key earned during an ominous trial.
What is Heavy Core used for?
Heavy Core is used to craft the Mace. Combine one Heavy Core with one Breeze Rod on a crafting table to make the weapon.
Is Heavy Core renewable?
Not from one base. Each Ominous Vault opens only once per player, but new Trial Chambers generate in unexplored areas, so more can be found by exploring.
Can Heavy Core be placed as a block?
Yes. Heavy Core is a placeable block with a distinctive heavy metallic core look, so it can be used as a decorative building element.
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