This article concerns StarCraft/StarCraft: Brood War gameplay. You may be looking for:
Robotic stealth scout
Observers are the protoss' mobile detectors. Although observers are 'permanently' cloaked, protoss players must be more alert to enemy anti-cloak units; the observer's low health gives little time to escape attackers. Observers are cheap enough to have a handful accompany an attack force, especially against a target with many detectors.
This unit is permanently cloaked. They cannot be seen or directly attacked by enemy forces, unless they have detector support.
- +1 armor bonus to shields per level for all units and structures.
The observer was initially called the "witness."