Ghost Helm

A Ghost Helm, also spelled Ghosthelm, is an Aeldari technology worn by Asuryani Farseers. This helmet, fashioned in the typical Craftworld Aeldari style, incorporates highly intricate, psychic circuitry crafted from crystal that is capable of masking the presence of the wearer's soul in the Immaterium.

This is a crucial protection for potent psykers like the Aeldari, whose souls shine like blazing beacons in the Warp, drawing the attentions of daemons and other hostile Warp entities.

Sources[]

Codex: Craftworlds (7th Edition) (Digital Edition), "Treasures of Vaul"
Codex: Eldar (4th Edition), pg. 26
Codex: Eldar (3rd Edition), pg. 34