Rumi's Pool Noodle Light-up "Four Tiger Sword"

Rumi’s Four Tiger Sword: Lore and Cultural Significance

In KPop Demon Hunters (Netflix, 2025), Rumi, the fierce leader of the K-pop group HUNTR/X, wields the "Four Tiger Sword," a glowing saingeom steeped in Korean mythology and shamanistic tradition. This radiant blade, inherited from her mother, Mi-yeong, a legendary demon hunter, is both a weapon and a spiritual conduit. Adorned with a violet-wrapped hilt, Dancheong patterns, and a norigae tassel charm, the sword channels soul energy from Rumi’s fans to unleash powerful Energy Slash attacks against the demon king Gwi-Ma. Its engravings reference the Four Tigers of Korean cosmology—guardians of the cardinal directions in ancient folklore—symbolizing protection and balance. In the film, the saingeom transforms into a Chilsung knife after absorbing a demon’s soul, amplifying its power to forge the Golden Honmoon, a mystical barrier sealing evil from the human world.

The sword’s design draws deeply from Korean cultural heritage. The saingeom, historically used by mudang (shamans) in gut rituals, was believed to sever malevolent spirits and restore harmony, a practice rooted in Korea’s shamanistic traditions dating back to the Three Kingdoms period (57 BCE–668 CE). Its celestial engravings and Dancheong patterns—vibrant, symmetrical designs seen in Korean temples—evoke spiritual purity and cosmic order. The Four Tigers motif reflects the Baekho (White Tiger) and other directional deities revered in Korean mythology, symbolizing strength and guardianship against chaos. The norigae, a traditional decorative knot, adds a feminine touch, echoing hanbok aesthetics and symbolizing luck and protection. By blending these elements with K-pop’s modern vibrancy, the sword embodies a fusion of ancient spirituality and contemporary female empowerment, honoring Korea’s cultural legacy while reimagining the saingeom as a pop-star warrior’s weapon.

Movie Context:

In KPop Demon Hunters, Rumi, a half-human, half-demon K-pop idol, leads HUNTR/X in a battle against the demon king Gwi-Ma, using her saingeom to protect humanity through music and swordplay. Her journey with the sword reflects her struggle with identity, culminating in a climactic concert where she wields its power to save the world.

This 3D-printable, light-up pool noodle Four Tiger Sword lets you embody Rumi’s strength and Korea’s rich mythological heritage.

Handle:

-.2 layer height

-3 walls

-20% infil, Adaptive Cubic

-Arachne wall generator

Guard and Top Piece:

-.12 layer height (or less)

-3 walls

-20% infil, Adaptive Cubic 

-normal (auto) suport

     -threshold angle 10

     -for best results use support PLA (enabled for  support/raft interface) 

     -cut out the thin layer of transparent material at the top end of the hand gard (where the light inserts)

-uses two Ring LED Magnetic Control Switch Light Blue

-A smooth ball spring plunger is used to add tension for better alignment 

Pommel:

-.2 layer height (or less)

-2 walls

-15% infil, grid

-space for a 6x2 magnet for attaching the optional tassel

Thread:

-.2 layer height 

-4 walls

-15% infil, Cubic

-make sure your slicer adds a brim

-uses the USB charging OLIGHT IMINI 2 to light the blade

printed with 

-Polymaker Gold Silk PLA (use Bambu silk PLA preset)

-Bambu transparent PETG (screw)

-Bambu pink translucent PLA

-Bambu blue glow PLA

-Cookiecad Mint Green Elixir PLA

-Cookiecad Witches Blue PLA (kind of purple)

-Cookiecad unicorn TPU (for the optional tassel)