Master the ultimate Palworld survival challenge by defeating the formidable Raid Boss Bellanoir to secure the legendary Multiclimate Undershirt, a game-changing piece of gear that provides essential heat and cold resistance for exploring the game's harshest islands.

Palworld in 2026 isn't just about catching cute Pals anymore; it's a full-blown survival adventure across wildly different islands. Some of these places, let's be real, are absolute mood-killers with their extreme weather. Exploring without the right gear? That's a quick trip from adventurer to Popsicle or a walking charcoal briquette. Enter the game's ultimate fashion statement for the practical survivor: the Multiclimate Undershirt. This little number isn't just stylish; it's a lifesaver, bundling both heat AND cold resistance into one sleek layer. Think of it as your personal, portable climate bubble. And here's the kicker—you can't just wish it into existence at a workbench. Nope, this legendary piece of kit has one source, and one source only: taking down the mighty Bellanoir in a Raid Battle. Talk about earning your stripes!

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Step 1: Building Your War Room (The Summoning Altar)

Before you even think about tangling with Bellanoir, you need the right address to send the invitation. That address is the Summoning Altar. Here’s your pre-raid checklist:

  • Reach Player Level 33. No shortcuts here, champ. Grind those levels.

  • Unlock the Altar Blueprint. Spend your hard-earned Technology Points in the menu.

  • Gather the Build Supplies:

  • Stone x100 (Start mining those rocks!)

  • Paldium Fragment x20 (The shiny blue stuff is everywhere, but you'll need a bunch).

  • Clear Out Space. This thing isn't small. Make sure you have a nice, flat spot inside your base territory.

Once you've got the goods, plop that Altar down. It's your ticket to the big leagues.

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Step 2: The Treasure Hunt (Bellanoir Slab Fragments)

With the Altar built, you're halfway there. Now, you need the key—or rather, pieces of it. You're hunting for Bellanoir Slab Fragments. These aren't lying around in the open; you have to go deep.

  • Where to Find Them: Dive into Dungeons. Not just any room, but you must defeat the Alpha Pal Boss waiting at the very end.

  • The Loot: After the boss falls, don't just sprint for the exit! Check the purple chests nearby. The Slab Fragment is one of the possible rare drops inside. It's all RNG, baby. Sometimes you get it, sometimes you... well, you try again.

🧩 Pro Tip: You'll need at least 4 Fragments to make a whole Slab. So, dungeon diving becomes your new part-time job. Pack heals and your strongest Pals!

Step 3: Crafting the Key & Ringing the Bell

Got your four shiny fragments? Excellent. Now, transform them.

  • Crafting Station: Head to your Production Assembly Line II. This isn't a job for the basic workbench.

  • Process: Select the recipe and combine those fragments into one glorious Bellanoir Slab.

  • The Summon: Finally, interact with your Summoning Altar with the Slab in your inventory. Brace yourself... the Raid is about to begin.

💎 Farming for the Undershirt & Pro Strategies

Bellanoir won't just hand over the Undershirt every time. It's a rare drop. If you're serious about getting it (and maybe a few for your squad), you need a farming mindset.

  • Stockpile Essentials: Remember those building materials? Stone and Paldium Fragments are your new best friends. Each time you summon Bellanoir, the Altar gets destroyed. You'll need to rebuild it every single time. Having a massive stash saves you so many headaches.

  • Team Up or Power Up: Bellanoir is no joke. In 2026, the meta has evolved. Bring Pals with strong opposite-element attacks and make sure your own gear is top-tier. Don't go in expecting a walk in the park.

  • Patience is a Virtue: The Multiclimate Undershirt is the ultimate prize. It might take a few (or several) attempts. But once you slip it on and stroll from a volcano right into a glacier like it's nothing? That feeling is everything. ✨

So, there you have it. The path to ultimate climate comfort in Palworld is paved with dungeon runs, boss battles, and strategic farming. Get that Altar built, gather your fragments, and answer the call of the raid. Your perfect undershirt is waiting.