“Kra-Koom!” serves as one of Marvel Comics’ distinctive onomatopoeic expressions specifically associated with the thunderous impact of Mjolnir striking its targets, typically appearing in bold, stylized lettering that visually conveys the hammer’s earth-shaking power. In the fourth release of its Super Heroes Series of high-relief coins, New Zealand Mint captures Thor’s hammer cracking through the design of a square silver coin. Now, 2025 2 oz Proof Niue Silver Thor Kra-Koom Coins are available online from JM Bullion.

Coin Highlights:

• Coin arrives 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 1 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, the mint features a depiction of the Niuean coat of arms. Known as the Public Seal of Niue, this image shows a ring of seashells surrounding native flora with a Sovereign crown at the top. The crown is emblematic of Niue’s association with the Commonwealth.

In the reverse design of the 2025 Proof Niue Silver Thor Kra-Koom Coin, the design depicts Thor’s hammer smashing through the design element in ultra-high relief. The Kra-Koom sound effect, along with variations like “Ka-Boom!” and “Krak-a-Doom!”, became integral to the Thor comic experience, helping readers feel the cosmic force behind each strike while establishing a unique auditory signature that distinguished Thor’s battles from other Marvel heroes.

Thor wields Mjolnir not merely as a blunt weapon but as a versatile tool that channels his godly powers, allowing him to fly by grasping its leather strap and hurling himself through the air, manipulate weather patterns, and create dimensional portals. In battle, he uses it with devastating precision—throwing it to strike multiple enemies before it returns to his grasp, spinning it to deflect attacks or create whirlwind barriers, and channeling lightning through it to amplify his already formidable strength.

These 2025 2 oz Proof Niue Silver Thor Kra-Koom Coins are available to you in presentation boxes and come with a Certificate of Authenticity. The coins are struck on square silver blanks with an ultra-high-relief strike for the colorized reverse design elements. 

JM Bullion customer service is available to assist you at 800-276-6508 when you buy silver. We are also available online through our web chat and email address.