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How to Get the Prismatic Pickaxe & Solve the 'Melting the Geyser' Puzzle

Learn how to solve the Melting the Geyser puzzle, find the Mosasaurus, and unlock the Prismatic Pickaxe (650 Power) in The Forge Roblox Winter Update.

Marcus Winter
Winter Expansion Guide
8 min read
prismatic pickaxemelting geyserfrostspire expansewinter expansionthe forgerobloxpuzzle guide

The Forge Roblox: Prismatic Pickaxe Guide & Stats

The Winter Expansion has introduced the single best harvesting tool in the game: the Prismatic Pickaxe. Hidden deep within the new Frostspire Expanse, this tool is essential for late-game progression, offering stats that eclipse even the Demonic Pickaxe.

However, many players are getting stuck on the cryptic "Melting the Geyser" or "Frozen Glacier" obstacle. This guide will clarify the mechanics, show you exactly where to go, and explain why this 2,000,000 Gold investment is worth every coin.


The "Melting the Geyser" Puzzle Explained

If you are searching for a torch, a fire spell, or a "Geyser" to melt the ice wall, stop searching. The community terms "Melting the Geyser" or "Melting the Glacier" are misleading.

The ice block protecting the Prismatic Pickaxe is not a puzzle; it is a Stat Check.

To break the ice, you do not need heat; you need raw power.

You need at least 320 Mining Power to break the ice.

If your current pickaxe has less than 320 Power, the ice will simply say "0 Damage" or remain unbreakable.

The Solution:

Before heading to the location, ensure you purchase the Snow Pickaxe from the Winter Merchant.

  • Cost: 750,000 Gold
  • Power: Sufficient to break the barrier

Pro Tip: Do not attempt this with the standard Iron or Gold pickaxes; you will just waste your travel time.


Step-by-Step Location Guide

Once you have the required Mining Power, follow this path to find the hidden vendor:

  1. Travel to Frostspire Expanse: Enter the new winter biome island.

  2. Find Bjorn's House: Look for the NPC named Bjorn. His house is a key landmark near the village center.

  3. Locate the Frozen Lake: Go directly behind Bjorn's house. You will see a small frozen lake.

  4. Enter the Hole: In the center of the lake, there is a hole in the ice. Jump in and swim down.

  5. Find the Mosasaurus: At the bottom, you will see a massive frozen prehistoric creature (resembling a Mosasaurus or Whale).

  6. Break the Ice: Use your 320+ Power pickaxe to break the ice casing near the creature's mouth.

  7. Purchase: Interact with the sparkling item inside to buy the Prismatic Pickaxe for 2,000,000 Gold.


Stats Analysis: Is it Worth It?

The Prismatic Pickaxe is currently the "Best in Slot" (BiS) for three reasons, making it superior to the Void or Demonic pickaxes:

Power Comparison Table

PickaxePowerLuckRune SlotsCost
Demonic Pickaxe17547.5%3Race-locked
Prismatic Pickaxe65072%42,000,000 Gold
Lightite Pickaxe10062%298,500 Gold

Why Prismatic is Best:

  1. Mining Power: 650 (Highest in the game, melts high-tier ores)
  2. Luck: +72% (Crucial for finding Iceite and Archangel rerolls)
  3. Rune Slots: 4 Slots (The only tool with 4 slots, allowing for massive customization with Miner Shards)

Getting the Gold: Farming Strategy

Need 2.75 million Gold total (750k for Snow Pickaxe + 2M for Prismatic)?

Recommended Farming Routes:

Early Game (1-2 hours):

  • Mine Galaxite in Volcanic Depths: ~500,000 Gold/hour
  • Complete reputation quests for bonus gold

Mid Game (30-60 minutes):

  • Use your existing pickaxe to mine Demonite or Darkryte
  • Sell excess ores you don't need for crafting

Speed Run (If you have Angel/Archangel race):

  • Enhanced mobility lets you hit multiple ore clusters 40% faster
  • See our race comparison guide for optimal builds

Common Mistakes to Avoid

❌ Don't bring low-power pickaxes - You'll waste travel time
❌ Don't search for fire sources - There are none; it's a power check
❌ Don't skip the Snow Pickaxe - It's a required stepping stone
✅ Do bring extra gold - Travel time is long if you're short on funds


Related Guides

Essential Reading:

Advanced Topics:


Final Thoughts

The Prismatic Pickaxe is a game-changer for the Winter Expansion. The "Melting the Geyser" puzzle confused thousands of players, but now you know the truth: it's Mining Power, not fire.

Gear up, grab that Snow Pickaxe, swim down to the Mosasaurus, and claim the best tool in The Forge.

Found any secrets I missed? Share your discoveries in the comments!


Data verified through extensive testing in The Forge (Roblox) Winter Expansion. Updated December 26, 2025.

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