Gaist

Gaist is named monster found in Shakan's Revenge, Blightwood.

"When the contamination kills someone here, they often return as a wraith. Since those slain by wraiths also return as wraiths, every battle weakens us and strengthens them. The oldest and most powerful wraith is Gaist. If Gaist were slain, we might be able to break the cycle."

- Lasiren

Killing Gaist has short cutscene. This monster drops Loksign Bracelet when killed. Lasiren tells you to take it to Gwahre in Tria. Ultimately you have to take the bracelet to the Altar of Beastlord Shakan in Startree Forest where it's silently consumed.