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AlliedCommanders SC2-LotV Art1.jpg

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

The ancient assimilator is a protoss assimilator enhanced with xel'naga technology. In an alternate timeline where Zeratul survived the opening stages of the End War, the dark prelate utilized these structures against Amon's Forces to harvest vespene gas automatically.[1]

Game Structure[]

The ancient assimilator is an automated assimilator available for Zeratul in Co-op Missions. When an ancient nexus is constructed, it will automatically begin construction of all buildable vespene geysers in range. If destroyed, the ancient assimilators can be manually rebuilt for no cost.


SC2 Vorazun AC - Orbital Assimilators.png
Ancient Assimilators

Vespene Gas is automatically harvested from Ancient Assimilators without requiring Xel'Naga Precursors.

Passive ability.

Cooldown 2 seconds

Produces 4 ProtossVespene SC2 Game1.png


Building Upgrades[]

SC2 ProShields.gif
Protoss Plasma Shields

Increases the shield armor of all protoss units and structures.


Instantly upgrades when Zeratul finds an artifact fragment.

Campaign Acquisition
Unlock Level 1 and 2 – Initially available.
Level 3 – Reach Zeratul Level 2.
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


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