“Kra-Koom!” is one of Marvel’s classic sound effects, tied to the heavy hit of Mjolnir as it lands. New Zealand Mint brings that moment to life in the fourth release of its Super Heroes Series, using a square silver canvas with dramatic depth. The result is a proof coin that looks like Thor’s hammer is breaking through the design. Now, 2025 2 oz Proof Niue Silver Thor Kra-Koom Coins are available online from BullionMax.

Coin Highlights:

• Coin ships in a presentation box with a Certificate of Authenticity included!
• 4th coin in the Super Heroes ultra-high-relief series!
• Colorized, high-relief reverse designs!
• Limited mintage of only 1,000 coins!
• Contains 2 troy oz of .999 pure silver.
• Issued a face value of $3 (NZD) by Niue.
• Obverse features the Niuean coat of arms.
• Reverse includes a depiction of Thor and his hammer smashing through the design field.

For the obverse of 2025 2 oz Proof Silver Thor Kra-Koom Coins, you’ll find the official coat of arms of Niue. Also known as the Public Seal of Niue, it shows a ring of seashells around native plants with a Sovereign crown above. The crown notes Niue’s connection to the Commonwealth.

In the reverse design of the 2025 Proof Niue Silver Thor Kra-Koom Coin, Thor’s hammer appears to break the field in ultra-high relief. The Kra-Koom effect—along with variations like “Ka-Boom!” and “Krak-a-Doom!”—has long helped readers feel the force of each strike and set Thor’s battles apart from other Marvel stories.

Thor uses Mjolnir as more than a hammer. It channels his powers, letting him fly by gripping the strap, call storms, and open portals. In combat, he throws it to hit targets in sequence before it returns, spins it to block attacks or raise a whirlwind, and guides lightning through it to boost his strength.

These 2025 2 oz Proof Niue Silver Thor Kra-Koom Coins arrive in presentation boxes and include a Certificate of Authenticity. Each coin is struck on a square silver blank, with an ultra-high-relief strike enhancing the colorized reverse details.

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