Learn how to defeat the Molten Monstrosity boss in Dig, including the magma boots requirement, Blue Moon Horn usage, and boss fight tips.

The Molten Monstrosity is one of the hardest bosses to beat in Dig, but it’s also required if you want to unlock the Starfire Shovel. If you’re working on the Magma Boots questline or just trying to explore the volcano fully, you’ll need to face this massive lava boss. This guide covers how to unlock the boss, how to wake it up, and how to actually win the fight, especially if you’re doing it with just two players.
Steps To Defeat the Molten Monstrosity Boss in Dig Roblox
Here is a simple step-by-step guide on how to defeat the Molten Monstrosity boss with ease:
Step 1: Complete the Magma Boots Quest

You can’t enter the volcano where the boss lives until you complete the Magma Boots quest. You can start this by speaking to the NPC in the jungle village near the volcano.
To complete the Magma Boots quest, you’ll need to:
- Reach level 50
- Dig up required items (shiny items, etc.)
- Defeat 10 bosses
- Obtain the Solstice Shovel
If you haven’t gotten the Solstice Shovel yet, here’s our full guide on how to get it.
Once you’ve done all of the above, return to the NPC to claim your Magma Boots, which give you heat protection and allow you to enter the volcano safely.
Step 2: Enter the Volcano

With the Magma Boots equipped, head to the volcano entrance and walk inside. Without the boots, you’d take instant burn damage. Now, you’ll be able to walk around freely and explore the lava-filled area.
Follow the trail until you find the Molten Monstrosity sleeping at the end of the path.
Step 3: Wake the Boss with the Blue Moon Horn

You’ll need a Blue Moon Horn to wake the boss. It can be purchased from the Tiki Shop near the jungle area for $200,000.
To wake the boss:
- Equip the Blue Moon Horn in your hotbar.
- Walk up to the sleeping Molten Monstrosity.
- Hold the horn and interact (press E) to wake it up.
The boss will awaken with 350,000 HP, and the fight will begin.
Step 4: Beat the Molten Monstrosity Boss

This fight is no joke. You only have 19 minutes to defeat the boss, and its attacks can be lethal if you don’t dodge them. Here are a few tips:
- Bring at least one friend. It’s nearly impossible to solo this boss unless you have very high stats and damage boosts.
- Use a Monarch Totem. This increases boss damage significantly and helps speed things up.
- Equip your best shovel. Some strong shovels (like the Solstice Shovel) may not work in the volcano due to terrain restrictions, so have a backup like the Prismatic Shovel.
- Avoid attacks. His attacks hit hard and can kill you quickly. Dying too many times will waste time and make you lose money.
If you do manage to win, you’ll get a few rewards like:
- Alloy
- Ornament
- Sticker (cosmetic)
But more importantly, you’ll unlock the ability to buy the Starfire Shovel, a powerful shovel only available after this boss fight.
Is It Worth Fighting the Molten Monstrosity?
Yes, if you’re going for the Starfire Shovel or want to complete your Journal. The shovel costs $600,000, but it’s one of the best in the game, and beating the Molten Monstrosity is the only way to unlock it.
That said, the fight is very tough and not worth attempting alone unless you’re heavily prepared. Bring backup, totems, and your best gear.
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