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, yet spiritless, bodies or self-powered automatons. Their original body will become limp, though, as there is nothing inhabiting it. Only 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 original 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.
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, not the host body's.
This mask is one of the few to have Elemental Powers, although it will not boost the user's powers if they already have spiritual abilities.
- Matoro used his Kanohi Iden to monitor Hahli's progress as she attempted to retrieve the Kanohi Ignika while underwater in Inferno.
- Toa Iro - Briefly; used once.
- Toa Inika Matoro - Formerly; changed into his Great Tryna when he became a Toa Mahri.
- Toa Isxe / Toa Haru Kovek - Primary mask.
- Kovek - Formerly; became Great when he was transformed into a Toa Isxe.
- Matoro - Formerly; became an organic Great when he was transformed into a Toa Inika.
- The reason why BIONICLE author Greg Farshtey didn't 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 couldn't 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 could theoretically work together to imitate the deceased being.