This article is about a/an Mirror Monster in Kamen Rider Ryuki.

Steel Giant Magnugiga (鋼の巨人 マグナギガ Hagane no Kyojin Magunagiga) is a Mirror Monster that is contracted to Kamen Rider Zolda in Kamen Rider Ryuki.


Magnugiga appears as Zolda's Contract Monster. It resembles a Minotaur and is referred to as the Steel Giant as its size and heavy arsenal gives it the appearance of a mecha. Zolda uses various parts of Magnugiga for weaponry. However, unlike all the other Contract Monsters, Magnugiga seems to be incapable of moving on its own. As revealed in the movie, Magnugiga never attacked Zolda after he quit being a Rider.


Magnugiga drawn by the Kanzaki siblings.

Magnugiga, along with every other Mirror Monster, were created from Yui Kanzaki's and Shiro Kanzaki's pictures from when they were younger.

Magnugiga first appeared in Mirror World when Zolda used a Final Vent to destroy another Mirror monster and in the process barely missing both Ren and Shinji.

It also played a pivotal role in the downfall of Jun.

Most of the time however, Magnugiga because of his large size, was used as a shield by Zolda when he was not going on the offensive.

Magnugiga was destroyed by Asakura when it was kicked into the vortex on Genocider's chest.

Kamen Rider Decade

Magnugiga in Kamen Rider Decade.

In the Rider War, Magnugiga is seen with Kamen Rider Zolda on top of ZeroLiner as Zolda uses his Final Vent against Decade's Final Attack Ride, but the attack fails and they're destroyed.



  • End of the World : Zolda's Final Vent; Zolda plugs the Magnuvisor into Magnugiga's back and fires all of its arsenal at once.


Through the use of certain Advent Cards, parts of Magnugiga's body can be used by Zolda as weapons or other equipment.

  • Gigacannon (ギガキャノン Giga Kyanon): A pair of cannons derived from Magnugiga's legs. They mount on Zolda's back and fire over his shoulders. They are summoned with Zolda's first Shoot Vent card.
  • Gigalauncher (ギガランチャー Giga Ranchā): A massive missile launcher derived from Magnugiga's arms combined together. It is summoned with Zolda's second Shoot Vent card.
  • Gigaarmor (ギガアーマー Giga Aāmā): A shield derived from Magnugiga's torso. It can also be used as a mount for the Gigalauncher. It is summoned with Zolda's first Guard Vent card.
  • Giga Tector (ギガテクター Giga Tekutā): A pair of shoulder armor derived from Magnugiga's knees. Never used.
  • Giga Horn (ギガホーン Giga Hōn): A gauntlet derived from Magnugiga's head. Never used.

Behind the scenes


Magnugiga's concept design.

Magnugiga was designed by PLEX.


  • Magnugiga is never shown eating onscreen in the series; this may be due to it being a machine, unlike the other contract monsters who are seemingly sentient beings.

See also


Icon-ryuuki.png Kamen Rider Ryuki
The 13 Kamen Riders
Shinji Kido - Ren Akiyama - Masashi Sudo - Shuichi Kitaoka - Miyuki Tezuka - Jun Shibaura - Takeshi Asakura - Satoru Tojo - Mitsuru Sano - Kamen Rider Odin - Goro Yura
Movie Exclusive: Itsuro Takamizawa - Miho Kirishima - Dark Shinji
The Alternatives
Hajime Nakamura - Hideyuki Kagawa
Kanzaki family
Yui Kanzaki - Shiro Kanzaki - Sanako Kanzaki
ORE Journal
Daisuke Okubo - Reiko Momoi - Nanako Shimada - Megumi Asano
Mirror Monsters
The Contract Monsters: Dragreder - Darkwing - Volcancer - Magnugiga - Evildiver - Metalgelas - Venosnaker - Genocider - Destwilder - Gigazelle - Goldphoenix - Biogreeza - Blancwing - Dragblacker - Psycorogue
Wild Mirror Monsters: Spiders (Dispider - Mispider - Respider - Solospider) - Zelles (Gigazelle - Megazelle - Magazelle - Negazelle - Omegazelle) - Zebraskulls (Iron - Bronze) - Boarders (Wildboarder - Shieldboarder) - Biters (Zenobiter - Terabiter) - Krakens (Bakraken - Wiskraken) - Gulds (GuldThunder - GuldStorm - GuldMirage) - Abyss (Abysshammer - Abysslasher - Abyssodon) - Buzzstingers (Hornet - Bee - Wasp - Frost - Broom) - Sheerghosts (Sheerghost - Raydragoon - Hydragoon) - Deadlemur - Gelnewt - Sonorabuma - Brobajell - Fake Kamen Rider Agito
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