|Title||Mask of Spirit|
The Kanohi Iden is the Mask of Spirit. It allows its user to temporarily release their spirit from their body. While released, their spirit can move at great speeds and inhabit other living, spiritless bodies or self-powered robots. However, their original body will become limp, as there is nothing inhabiting it. Those who wear Kanohi Elda or Kanohi Rode can see and communicate to the user's released spirit.
While released, the user's spirit cannot access any of their body's powers, because the use of powers requires a union of the spirit and the body. Their body is also vulnerable, as they have no way to protect it themselves. If the user's body is killed, their spirit will eventually fade away, as they have no body to return to; however, if the user's Iden is destroyed while their body remains intact, the user's spirit will be forced back into their body.
Multiple Kanohi Iden-users have the ability to swap bodies by sending their spirits into each other's spiritless bodies. A Toa's powers are tied to their spirit, however, not their body, so if a Kanohi Iden-using Toa goes into another body, the body will have the spirit's Elemental Powers.
- Matoro - Formerly; changed into an organic Great version when he became a Toa Inika
- The reason why BIONICLE author Greg Farshtey did not want Matoro to have Elemental Powers in the story when he released his spirit is because it would give him an unfair advantage, since Matoro could attack beings who could not sense him.
- If a Kanohi Iden-user goes into a corpse and a Kanohi Tryna-user focuses their power on the deceased body, the two mask-wielders can work together to imitate the deceased being.
|Legendary||Ignika | Vahi | Mask of Creation|
|Great/Noble||Hau | Kaukau | Miru | Kakama | Pakari | Akaku | Aki | Rua|
Huna | Rau | Mahiki | Komau | Ruru | Matatu
Calix | Elda | Suletu | Sanok | Kadin | Iden
Arthron | Faxon | Zatth | Garai | Volitak | Tryna
Jutlin | Avsa | Felnas | Mohtrek | Shelek | Crast | Mask of Mutation | Mask of Scavenging
Pehkui | Mask of Clairvoyance | Kualsi | Mask of Emulation | Mask of Growth | Mask of Rahi Control
Avohkii | Kraahkan | Mask of Light and Shadow
Mask of Psychometry | Rode | Olmak | Mask of Charisma
Olisi | Kiril | Mask of Intangibility | Mask of Possibilities | Mask of Elemental Energy
|Nuva||Hau Nuva | Kaukau Nuva | Miru Nuva | Kakama Nuva | Pakari Nuva | Akaku Nuva | Aki Nuva | Rua Nuva|
|Others||Golden Kanohi | Infected Kanohi | Mask of Victory | Other Kanohi|
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