Althi

The Kanohi Althi was the Mask of Possession. It allowed it's user to project their spirit from their body for a very limited time until they find another body and possess it, regardless of any spirits already inhabiting it.

Description
The Althi was often an unpopular mask among the Brotherhood of Makuta, and as such those who wore it became unpopular. It's unpopular were mainly due to the awful noise it made when activated, which has been described as "an insect-ridden, metallic tree being uprooted from a demonic boulder". This noise is loud, high-pitched and distasteful enough to make even Teridax wince.

When activated, after said noise is made, the user's spirit will be "uprooted" from their body, essentially killing them. They are then given around a fifteen-second timer to find another body, otherwise they will be forcefully placed inside their own body. If their body is destroyed, they will recieve painfull psychic backlash, and their ability to possess will weaken until their body is repaired. If they are successful in finding a body, any spirits arleady inhabiting it will be temporarily trapped in a purgatory-like dimension, and the user will have full control of their body, mind, and powers.

Wearers

 * Makuta Hysterix

Trivia

 * To escape death, Makuta Hysterix used his Great Althi to escape his body before it was destroyed. In this state, he was exposed to so much psychic pain that he eventually became immune to it, and was able to possess a being if they were corrupt or newly awakened. He also seemed to be able to mess with machinery and plant thoughts in the minds of others.
 * The Althi is considered an immoral mask, and as such Toa would choose not to wear it.
 * The mask's powers are similar to the Iden's, almost like a corrupt version of the mask.