Elda

The Kanohi Elda is the Mask of Detection. It allows the user to see nearby hidden beings and objects (such as a user of the Kanohi Huna or Iden). The main difference between the Noble and Great versions is the the latter is designed to lead the bearer to the Kanohi Ignika. This works through a series of headaches, growing stronger the close one gets to the Mask of Life. Because of this, very few Great Elda exist.

Matoran

 * Nuukor
 * Goll (Formerly)
 * Sidrix (Formerly)

Great

 * Hahli
 * Tourik
 * Mayak
 * Neytira
 * Ahsia
 * Parelis (When possessing the body of an unknown Toa of Water)
 * Nekari (Secondary)

Noble

 * Ekumas