Infusion

Infusion is the process of imbuing a set of armor with shielding against Spectral Agony, used by the Mursaat. Infused armor greatly reduces the damage and effects of the Mursaat's attack. Seers in Tyria will infuse all the armor equipped by party members in exchange for the Spectral Essence of an Eidolon or Ice Beast.

Infusion locations
Only Seers in the Prophecies campaign will infuse armor. They can be found in one area and three of the final missions of the game
 * Iron Mines of Moladune (mission).
 * Ring of Fire (mission)
 * Abaddon's Mouth (mission)
 * Mineral Springs (using essence dropped from an Ice Beast)