Heavy Core in Minecraft — Complete Guide (Mace Crafting, Trial Chambers, Damage)
Short answer: The Heavy Core is a rare 1.21 item used to craft the Mace, Minecraft's most powerful weapon. Heavy Cores ONLY drop from Vault blocks in Ominous Trial Chambers (the cursed version of Trial Chambers, triggered by drinking an Ominous Bottle). 1 Breeze Rod + 1 Heavy Core = 1 Mace. The Mace deals base 6 damage but scales by HOW FAR YOU FELL when you hit — fall 5 blocks then hit a mob = 17.5 damage. Fall 20 blocks = ~37 damage one-shotting most mobs. With Density and Wind Burst enchantments, the Mace becomes the highest-damage weapon in Minecraft history.
Quick Answer Table
| Question | Answer |
|---|---|
| Where to find Heavy Core? | Ominous Vaults in Ominous Trial Chambers ONLY |
| Drop rate? | ~25-50% from each Ominous Vault |
| Used for? | Crafting a Mace (1 Heavy Core + 1 Breeze Rod) |
| Stackable? | Yes — up to 64 |
| Renewable? | Yes — Ominous Vaults respawn after Ominous Trials reset |
| Tradeable? | No — must be looted yourself |
How to Get a Heavy Core (Step by Step)
- Find a Trial Chambers structure (Y-level 30 to -50, common in Deepslate caves)
- Complete all Trial Spawners — they drop regular Trial Keys
- Get an Ominous Bottle — drops from killing Pillager Raid mobs at higher Bad Omen levels, or trade from Cleric villager
- Drink the Ominous Bottle → "Trial Omen" effect applied
- Re-enter the Trial Chamber → Trial Spawners become Ominous (red glow, harder mobs)
- Complete the Ominous Trials → drop Ominous Trial Keys
- Use Ominous Trial Keys on Ominous Vaults (locked vaults with red glow)
- Each Ominous Vault has a chance to drop a Heavy Core (plus other loot)
Crafting the Mace
The Mace recipe:
- Top: 1 Breeze Rod (drops from Breeze mobs in Trial Chambers)
- Middle: 1 Heavy Core (drops from Ominous Vaults)
- Bottom: empty
Output: 1 Mace.
Mace Damage Mechanics
The Mace's damage formula is the key insight:
- Base damage: 6 (less than a Diamond Sword)
- Smash attack damage = base + (fall distance × 4) for first 3 blocks
- For each block above 3, add 2 damage
- Fall 5 blocks then hit = 6 + 12 + 4 = ~17 damage
- Fall 10 blocks = 6 + 12 + 14 = ~32 damage
- Fall 20 blocks = 6 + 12 + 34 = ~52 damage (one-shot the Wither)
The Mace also negates fall damage on the hit — you take 0 fall damage when you smash a mob.
Mace Enchantments (1.21+)
| Enchantment | Effect |
|---|---|
| Density I-V | +0.5 damage per fallen block, per level. Density V on 10-block fall = +25 damage |
| Breach I-IV | Ignores 15% armor per level. Breach IV = 60% armor bypass |
| Wind Burst I-III | Launches you upward after a smash attack — chain smashes possible |
| Smite, Mending, Unbreaking | Standard enchantments work |
Common Questions
Can I get Heavy Cores from regular (non-Ominous) Trial Chambers?
No. Heavy Cores ONLY drop from Ominous Vaults. Regular Vaults drop iron, emeralds, diamonds, but never Heavy Cores.
How rare is the Heavy Core drop?
~25-50% per Ominous Vault. Plan to open 2-4 vaults per Heavy Core. Some Trial Chambers have 6+ Ominous Vaults.
Can Heavy Cores be duplicated?
Only via creative mode. No vanilla duplication exists.
For more 1.21 guides, see Vault Block Guide, Breeze Mob Guide, and Crafter Guide.