Forging the Infinity Blade: 21cm Fierce Deity Sword Metal Replica
Welcome back to the BlacksmithSONG forge. In our last session, we bathed in the sacred light of the 183g heavyweight Master Sword. Today, the sky turns dark, and a terrifying moon threatens to crush our workbench.
We are stepping into the twisted lore of Majora's Mask to examine a weapon born of pure, concentrated dark energy: the Fierce Deity Sword.
Before we break down the insane casting process of this double-helix blade, dim your lights and watch the metallic gradient shine in our terrifying Termina diorama below:
The Hollow Casting Paradox: 21cm yet only 71g
If you are a regular at our forge, you know we love heavy metal. So, when you see a weapon that is 21cm long, you might expect it to weigh over 100 grams. Yet, the Fierce Deity Sword tips our scales at exactly 71 grams.
Is it hollow plastic? Absolutely not. It is 100% cold zinc alloy. The weight reduction is a result of extreme geometric engineering.
| Zelda Relic | Physical Length | Gram Weight | Blade Geometry |
| Fierce Deity Sword | 21 cm | 71 g | Double-Helix Hollow Center |
| Master Sword | 28 cm | 183 g | Solid Broadsword |
Take a look at the scale when held directly across the palm of our blacksmith's hand.
The blade is practically a metallic infinity symbol. It splits at the hilt into two distinct ribbons of metal, twisting around empty space before violently rejoining at the razor-thin tip. Casting a hollow structure like this in liquid zinc without the metal warping or snapping as it cools requires incredibly precise mold temperature control. That 71g weight makes it a perfectly balanced, lightweight artifact that feels incredibly fast and lethal in your fingers.
The Toxic Teal Gradient
Unlike the regal golds and purples of Hyrulean royal guard weapons, the Fierce Deity is chaotic.
Focus on the close-up shot resting on the wood slice.
We didn't just paint this sword flat green. We applied a multi-layer metallic electroplating process that creates a stunning teal-to-green gradient. The color shifts dynamically depending on the angle of your desk lamp, perfectly replicating the magical, otherworldly aura of the mask that created it. The grip features a molded, crisscross wrapping texture, ensuring this 21cm artifact won't slip when you are admiring it.
(Fascinated by unique blade geometries? Expand your armory by visiting our complete Metal Swords Collection here.)
A Diorama of Doom
A sword with this much terrifying lore shouldn't be displayed in a bright, cheerful room.
Notice the eerie setup in our studio gallery, featuring the terrifying falling moon, the cursed Majora's mask, and scattered Ocarinas.
Whether you mount it on its included triangular base or rest it against a piece of dark slate on your gaming desk, its toxic green shine cuts through the shadows, serving as a constant reminder of the three-day countdown to the apocalypse.
Harness the power of the Fierce Deity, before the moon falls.
Claim your 21cm Fierce Deity Sword Replica right here.
Our Hyrulean forge is only getting hotter. Prepare your inventory, and explore the rest of the epic artifacts in the BlacksmithSONG Legend of Zelda Armory.


















