History of Scanner

Scanner is a yellow augment from Operation: Seraph's Shield, an Exotic mission in Season of the Seraph. It is the mechanic that drives most of the mission's puzzles. Destinypedia lists the Season of the Seraph as the first appearance of the augment in this form, and it is dropped by Scanner Splicers, Elite-tier Vandal Fallen usually protected by other Fallen. Other guides describe picking it up by defeating the Fallen carrying the marker, which is shown as a yellow oval above them.

Once held, the Scanner makes important objects glow a bright yellow. Interacting with a highlighted object reveals more terminals, and activating three terminals in a set unlocks new passageways aboard Seraph Station. Some puzzles hint at the correct terminals by which ones glow. Deposit the augment at an Augmentation Terminal to open the nearby door or area, and some areas strip it from you, so memorize the path first. The augment has an infinite duration, persists after death, and only one augment can be active at a time.