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This article or section contains information derived from Co-op Missions, and should not be considered part of the official StarCraft storyline.

The xel'naga watcher is a variant of the observer enhanced by xel'naga technology. In an alternate timeline where Zeratul survived the opening stages of the End War, the dark prelate deployed them against Amon's Forces.[1]

Game Unit[]

The xel'naga watcher is available to Zeratul in Co-op Missions. They serve as Zeratul's mobile detection, and can be upgraded to increase their speed and sight radius.[1]

Abilities[]

This unit or structure can detect cloaked, burrowed, duplicated and hallucination enemies.

ve
ObserverCloaking SC2 Icon1.jpg
Permanent Cloaking

The xel'naga watcher is permanently cloaked. They cannot be seen or directly attacked by enemy forces, unless they have detector support.

ve
WatcherSurvalenceMode Coop Game1.JPG
Surveillance Mode

The xel'naga watcher can switch to Surveillance Mode. In Surveillance Mode the xel'naga watcher is immobile and gains 50% increased sight radius. Can switch back to Watcher Mode to move again.

Usage
Hotkey E (Surveillance Mode)
T (Watcher Mode)
Cooldown 3 seconds
ve

Upgrades[]

GraviticBooster SC2 Game1.png
Gravitic Boosters

Increases the movement speed of Xel'Naga Watchers by 50%.

Campaign Acquisition
Unlock Reach Zeratul Level 6.
Acquisition
Purchased from Constructs bay
Required Find the second artifact fragment
ve
SensorArray Coop Game1.JPG
Sensor Array

Increases the sight radius of Xel'Naga Watchers by 50%.

Herald of the Void: Sensor Array is unavailable.

Campaign Acquisition
Unlock Reach Zeratul Level 13.
Acquisition
Purchased from Constructs bay
Required Find the third artifact fragment
ve
SC2 ProAirArm.gif
Protoss Armor

Increases the armor of all protoss units and defensive structures.

Usage
Passive
Notes

Instantly upgrades when Zeratul finds an artifact fragment.

Campaign Acquisition
Unlock Level 1 and 2 – Initial available.
Level 3 – Reach Zeratul Level 2.
Acquisition
Level 1
Required Find the first artifact fragment
Effect Armor: 2
Level 2
Required Find the second artifact fragment
Effect Armor: 3
Level 3
(unavailable with Herald of the Void)
Required Find the third artifact fragment
Effect Armor: 4
Level 4-103
(with Knowledge Seeker)
Required Find the fourth and more artifact fragments (summary 103)
Effect Armor: 4 +1 per artifact fragment. Up to a maximum 104
ve
SC2 ProShields.gif
Protoss Plasma Shields

Increases the shield armor of all protoss units and structures.

Usage
Passive
Notes

Instantly upgrades when Zeratul finds an artifact fragment.

Campaign Acquisition
Unlock Level 1 and 2 – Initially available.
Level 3 – Reach Zeratul Level 2.
Acquisition
Level 1
Required Find the first artifact fragment
Effect Shield armor: 1
Level 2
Required Find the second artifact fragment
Effect Shield armor: 2
Level 3
(unavailable with Herald of the Void)
Required Find the third artifact fragment
Effect Shield armor: 3
Level 4-103
(with Knowledge Seeker)
Required Find the fourth and more artifact fragments (summary 103)
Effect Shield armor: 3 +1 per artifact fragment. Up to a maximum 103
ve

References[]

  1. 1.0 1.1 Blizzard Entertainment. Co-op Missions. (Activision Blizzard). PC. Zeratul (in English). 2018.
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