Haze Seas Lava Ore and Lava Key Guide: How to Spawn the Mace Boss!

Some of the most valuable rewards in Haze Seas are locked behind hidden requirements, and the Mace Boss is a perfect example. Before you can challenge this powerful enemy, you need to collect two important items: the Lava Ore and the Lava Key. While neither item is required for general progression, both are essential if you’re hunting exclusive boss drops and powerful equipment. This guide explains how to obtain the Lava Ore and Lava Key, how they work together, and what rewards you can earn from defeating the Mace Boss.

How to Get Lava Ore in Haze Seas

Lava Ore is a rare item that drops from the Marine Captain boss located in Marine Base Town. Players must repeatedly defeat this boss and hope for the item to appear as a reward.

The drop rate for Lava Ore is only 5%, making it one of the rarer boss-related materials in the area. Because of this low chance, you may need multiple attempts before successfully obtaining one.

To improve your chances of getting Lava Ore quickly, it helps to farm the Marine Captain whenever he respawns and stay prepared for a potentially long grind.

What Is Lava Ore Used For?

Lava Ore serves a single but important purpose in Haze Seas. It is used to summon the Mace Boss, a special enemy that drops exclusive rewards unavailable through standard gameplay.

Once you have obtained a Lava Ore, you need to travel to the hidden cave located behind Marine Base Town. Inside the cave is a cauldron that acts as the summoning point for the boss. Placing the Lava Ore into the cauldron immediately triggers the Mace Boss encounter.

However, reaching the cauldron is not as simple as walking into the cave. A locked gate blocks access, which is why you’ll also need the Lava Key before you can proceed.

How to Get the Lava Key

Unlike Lava Ore, the Lava Key is not obtained from defeating enemies. Instead, it can be found in Marine Base Town as a collectible item.

Look near the town’s spawn area for a wooden table surrounded by four chairs. Three of the chairs remain upright, while one chair is tipped over on the ground. The Lava Key can be found on this table.

Because the item is easy to overlook, many players walk past it without realizing its importance. Carefully checking the furniture near the spawn area should help you locate it quickly.

What Is the Lava Key Used For?

The Lava Key is required to unlock the metal gate that seals the cave behind Marine Base Town. Without it, players cannot enter the cave and therefore cannot access the cauldron needed to summon the Mace Boss.

Even if you already have Lava Ore in your inventory, it will be useless until you unlock the cave entrance. For this reason, obtaining the Lava Key should be one of your first steps before farming for Lava Ore.

Together, these two items create the complete process for accessing one of the game’s hidden boss encounters.

How to Spawn the Mace Boss

Summoning the Mace Boss requires completing a few simple steps:

• Obtain a Lava Key from Marine Base Town.
• Use the key to unlock the cave behind Marine Base Town.
• Defeat the Marine Captain until a Lava Ore drops.
• Enter the cave and locate the cauldron.
• Place the Lava Ore into the cauldron.
• Fight the Mace Boss after it spawns.

The boss appears directly inside the cave, making the battle begin almost immediately after the summoning process.

Mace Boss Rewards

To qualify for loot drops, players must contribute at least 20% of the total damage dealt to the Mace Boss. Failing to reach this threshold means you may not receive the available rewards.

Upon defeating the boss, players can earn the following items and resources.

Mace V1 Sword

Drop Chance:

• 100%

Abilities:

• Earth Crash (Requires Sword Level 50)
  • Slams into the ground and deals impact damage to nearby enemies.
• Bagua (Requires Sword Level 150)
  • Charges directly toward opponents and deals damage.

The Mace V1 Sword is a guaranteed reward and provides a solid option for players looking to expand their weapon collection.

Coded Mask

Drop Chance:

• 100%

Bonuses:

• Increases Sword Damage by 5%
• Increases HP by 500

The Coded Mask is one of the more useful accessories available from early boss content. The additional health boost improves survivability, while the Sword Damage increase benefits players focused on melee combat.

Additional Rewards

Defeating the Mace Boss also grants:

• 700 Bounty
• 15 Gems
• 5,000 Coins

These extra rewards make the encounter worthwhile even after you’ve already collected the guaranteed equipment drops.

The Mace Boss is one of the most rewarding optional encounters available around Marine Base Town. Although acquiring Lava Ore can take time due to its low drop rate, the guaranteed rewards help justify the effort. The Mace V1 Sword provides a unique weapon with unlockable skills, while the Coded Mask offers useful stat bonuses that remain valuable throughout progression. If you’re looking to strengthen your character, collect exclusive gear, or simply experience more of Haze Seas’ hidden content, gathering the Lava Key and Lava Ore should be high on your priority list.