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A KPop Demon Hunters Rumi sword is currently in the works, with a release date set for July 1, 2027. Available for preorder, the latest merch from the franchise’s official store is a full-size, interactive sain-geom premium electronic replica. The sword’s standout features include motion-activated lighting and sound effects from the movie, giving fans the chance to take their Rumi cosplay to new heights.
In KPop Demon Hunters, Rumi’s primary weapon is the sain-geom, also known as the Four Tiger Sword. The blade (the toy is made from plastic, of course) has a sleek, Art Deco look with glowing runes and constellation-like details, which this new product mimics with its illuminated blade and detailed design.
Amazon
interactive sword
‘KPop Demon Hunters’ Rumi Sain-Geom Premium Electronic Sword
Preorder
Includes a sword and a plastic display stand.
Built for interactive play and display, the KPop Demon Hunters Rumi sword offers four modes with 50+ LEDs and sound effects inspired by the film. It responds to movement, music and singing, unlocking unique light patterns as you swing and when you listen to official music from the movie. The lights also match the rhythm of your favorite songs and can react to the sound of your own singing.
A rechargeable battery powers the sword during use, while a USB-C port supports a lit-up shelf display. Use the clear, purple-tinted stand with the HUNTR/X logo to rest the sword when not in use. At roughly 40 inches long, it has the scale of a full-size prop, making the $224.99 price tag a little easier to justify.
Amazon
KPop Demon Hunters has become a global success since its release in June 2025, spawning a seemingly endless supply of merch, like KPop Demon Hunters Squishmallows, Mattel dolls, Vans shoes, backpacks and myriad other collectibles. Rumi’s sword is the latest must-have for any collector.
While you wait for the lifelike, interactive Rumi sword, shop the KPop Demon Hunters Nerf swords. These foam weapons are another hot commodity, with Amazon alerting fans to act fast as stocks are low.
