The Kanohi Nehas is the Mask of Undeath. It allows the user to store energy over a period of time within the mask. When the user dies, the Kanohi reanimates the corpse for as long as it has energy charged up for, by infusing the stowed energy into the deceased bearer's body, in an attempt to carry out a set task that the user programmed into the mask prior to their death. This mask is considered very unlucky to wear and when undead a user's eyes and heartlight turn black.
In The Few Deaths of Makuta Montrox, Montrox attempted to use his Kanohi to attain three heartlights and a Hau from Smehi, Unemi, and Tåkån respectively in order to revive Åhm-uh. Since he had just started wearing the mask on the day he was killed, he was only able to get Smehi and Unemi's heartlights.
- Toa would not typically wear this mask due to the fact that they feel its' power is immoral.
- This mask name was created by BZPower and C.I.R.C.L.E. member Toa_Ausar.