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Prismantus is the Boss of the Grim Temple in Tri Force Heroes.


Prismantus is a three-pronged creature with a large eyeball at its center, and a differently-colored light bulb at the end of each prong, matching the three Links' colors. It attacks by spinning quickly in place for a few seconds, then dashing toward the Links at a high speed. After each dash, Prismantus briefly spins more slowly, before repeating the attack pattern. The colored light bulbs at its sides are its weak points during this stage, and can only be damaged by the Link whose tunic corresponds with the bulb's color. As its body is constantly spinning, the Links must carefully time their Sword attacks to strike the right bulb. After a bulb is struck twice, it will shut off. After all three bulbs are shut off, Prismantus will be stunned and its spinning halts, exposing its eye. The Links can then form a Totem of two, and either strike the eye directly, or throw the top Link on top of its prongs to strike the eye from there. If the eye is damaged enough during this time, the battle will move on to the next phase; otherwise Prismantus will eventually recover and resume its attack pattern.

In the second phase, the light bulbs turn back on and Prismantus turns up onto its side, using two of its bulbs as "feet". It begins rolling around the room, occasionally turning to roll toward the nearest Link or Links. It will eventually stop momentarily, allowing the Links to easily strike its light bulbs. As one of its bulbs is usually raised off the ground, this can require the Links to form a Totem of three to reach it. Shutting off all bulbs will stuns Prismantus and reveal its eye again. In the third phase, Prismantus stands up on just one light bulb, and charges a powerful beam that reaches the full length of the Stage. It will fire this beam around the Stage while rotating for several seconds, before continuing to roll toward the Links again at an even faster pace, eventually stopping to fire another beam. The Links must again strike its light bulbs to stun it, which will likely require them to form a Totem of three to strike its upper bulbs while it fires a beam. It will be defeated after several more hits to its exposed eye.


Prismantus's Japanese name is onomatopoeia of the booming noise it makes when it moves.[1] This was the original Japanese name of Gigaleon, but was changed as it fitted Prismantus better.[2]

Prismantus also had several Japanese names during developement, including Yの字君 (Y Guy) and Cyclops.[3]

TMC Forest Minish Artwork.png Names in Other Regions TMC Jabber Nut Sprite.png
ダムダム (Damudamu)[5]Dumdum
The French Republic
The Federal Republic of Germany
The Italian Republic
Tri Trottola[4] 
The Republic of Korea
덤덤 (Deomdeom)[8]Dumdum
Latin America
The Kingdom of Spain
This table was generated using translation pages.
To request an addition, please contact a staff member with a reference.


  1. "[...]but then we realised that the "Cyclops" also makes a booming noise when it moves, and we thought that the name "Dum-Dum" would probably fit it better." —Mikiharu Oiwa (Tri Force Heroes Miiting part 2.)
  2. "It's the mid-boss of the Sky Realm, which is called "Gigaleon" in the retail version. We originally called it "Dum-Dum" because of the sounds it makes when it shoots projectiles" —Mikiharu Oiwa (Tri Force Heroes Miiting part 2.)
  3. "Anyway, we created the boss of The Ruins next, and I initially went completely literal and just nicknamed him the "Y guy". But then again, that really doesn't sound like a proper name, does it? Next I thought about borrowing the name of the one-eyed Greek monster, Cyclops, but it seemed too long and I was worried that people would call it "Cyplos" or something instead..." —Mikiharu Oiwa (Tri Force Heroes Miiting part 2.)
  4. "Tri Trottola" — N/A (Tri Force Heroes)
  5. "ダムダム" — N/A (Tri Force Heroes)
  6. 6.0 6.1 6.2 "Dumdum" — N/A (Tri Force Heroes)
  7. "Doumdoum" — N/A (Tri Force Heroes)
  8. "덤덤" — N/A (Tri Force Heroes)
  9. "Prismantus" — N/A (Tri Force Heroes)