The Kanohi Rethus is the Mask of Agony. It allows the user to stimulate various levels of pain within a target, for as long as the user concentrates.
- Makuta Antaa - Primary mask.
- Makuta Sinosis - Primary mask.
- Makuta Vespax - Primary mask.
- Toa Artæva "Nari" - Primary mask.
- Toa wouldn't typically wear this mask, as they feel its' power is immoral.
- This mask was created by BZPower and C.I.R.C.L.E. member Talvak.