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Purification SC-Com6 Comic1

Carriers glassing Urona Sigma

Glassing,[1][2] or purification,[3] is a protoss war technique used to destroy all life on planetary surfaces, usually to eradicate the presence of zerg.

A purification attack is carried out by ships firing massive energy beams to sterilize planetary surfaces.[4][5][6] Carriers are equipped for this purpose,[5] and can project energy from their bows.[6] Motherships,[7] and possibly other large ships[8][4] may also be used to purify planets.

Glassing may disperse most of a planet's atmosphere, and release magma onto the surface by burning through the crust.[5] Minerals on glassed worlds are often altered by the attack.[9]


Great WarEdit

"Mr. Liberty, let me make myself perfectly clear. We have made first contact with another alien civilization. This contact consisted of them vaporizing the colony of Chau Sara. They burned it to the ground, and then burned the ground beneath it."
PurificationChauSara SC2 Art1

The protoss burn Chau Sara

When the protoss discovered the extent of the zerg infestation of Chau Sara, Executor Tassadar reluctantly ordered his expedition's ships to power up their weapons, destroying the planet,[10] firing at both terran settlements and other points.[5] At least two ships, firing massive energy beams, obliterated most or all life. A small number of marines, including Andre Madrid, survived the attack by hiding underground.[4]

Tassadar avoided attacking the next infected world, Mar Sara, until after the terrans had evacuated. Several hours after the escape, Tassadar's forces again sterilized a planet.[11]

A large battle between the zerg, Terran Confederacy and Sons of Korhal broke out on Antiga Prime. After a particularly devastating zerg attack on the Confederacy (guided by a Sons of Korhal psi emitter), Tassadar's forces attacked Antiga Prime, purifying it.[12]

Tassadar's fleet arrived at the Confederate capital world of Tarsonis, which had been besieged by zerg due to the Sons of Korhal's use of psi emitters. Sarah Kerrigan, a ghost, believed that the Protoss Expeditionary Force arrived with the intention of destroying the planet. Forces under her command defeated the protoss.[13] The protoss did not purify Tarsonis. Protoss, zerg and terran forces continued to fight on the planet's surface.[14][15][16]


Purification SC-Com6 Comic2

Urona Sigma is purified

An attack took place under mysterious circumstances on the ice world of Braxis sometime after the Brood War.[3] The planet refroze since the incident.[17]

The protoss also partially purified the world of Urona Sigma in 2502.[18]

Second Great WarEdit

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This article or section contains information from the optional Colonist Missions in StarCraft II: Wings of Liberty.

"The only cure for infestation is purification by fire!"

In 2504, Dr. Ariel Hanson intended to relocate several hundred colonists to a world called Haven, a world ideal in all aspects aside from that it was very close to protoss space. After supporting Jim Raynor's campaign for a few weeks, she returned to Haven to find that the zerg had infested the world and several protoss warships had entered orbit to purify the planet. The protoss, recognizing the Hyperion, asked for Raynor to help in the purification, while Hanson asked for time to complete a cure for the infestation.[19]

Plot branch : Raynor's Raiders defend Haven from the protoss. (A canon)
PurifierMothership SC2 Game2

The Purifier attacking Haven

Raynor chose to help Hanson defend the colony. This angered Executor Selendis, and she sent the powerful Purifier, a mothership, to purify the terran colonies.

Raynor managed to save most of the colonists by evacuating them before his forces destroyed the mothership. Hanson departed the Hyperion to join the colonists.[19][20]

Plot option ends here


If the prophecy imparted to the Church of Besainted Pelagius is to be believed, a "cauterization" of the universe is what awaits Creation in Armageddon. Such a technique is/will be similar to purification.[8]

Purified WorldsEdit

Purification SC-FL2 Comic1

Purifying a planet

Main article: Purified worlds


According to Thundergod, the attacks came from multiple ships which resembled motherships.[23] Motherships were not recalled into service until after the zerg devastated Aiur.[24][25]


  1. 2013-11-09, StarCraft 2: Legacy of the Void: Campaign Needs More Work, Blizzard Says. Warcry Network, accessed on 2013-11-09
  2. 2014-12-18, Battlecruiser Science. Blizzard Entertainment, accessed on 2014-12-21
  3. 3.0 3.1 Blizzard Entertainment, Mass Media Inc. StarCraft 64. (Nintendo of America, Inc.) Mission: Resurrection IV (in English). 2000.
  4. 4.0 4.1 4.2 Metzen, Chris & Samuel Moore (March 29, 1999). "StarCraft: Revelations." Amazing Stories 596 (Spring): 20-27.
  5. 5.0 5.1 5.2 5.3 Grubb, Jeff (February 27, 2001). StarCraft: Liberty's Crusade. Simon & Schuster (Pocket Star). ISBN 0-671-04148-7.
  6. 6.0 6.1 Furman, Simon (w), Federico Dallocchio, Mike S. Miller, Carlos D'Anda (p, i). "StarCraft #6" StarCraft 1 (6) (November 25, 2009) DC Comics (Wildstorm).
  7. Mothership. Accessed on 2008-03-30
  8. 8.0 8.1 Gillen, Kieron (w), Hector Sevilla (art). "A Ghost Story." In StarCraft: Frontline: Volume 2 (paperback binding), pp. 122-169. Tokyopop, January 1, 2009. ISBN 1427-80831-7.
  9. 2008-7-24. Mar Sara. Official StarCraft II Website. Accessed 2008-7-24.
  10. Underwood, Peter, Bill Roper, Chris Metzen and Jeffrey Vaughn. StarCraft (Manual). Irvine, Calif.: Blizzard Entertainment, 1998.
  11. StarCraft. Vivendi Games. Mission: The Jacobs Installation (in English). 1998.
  12. StarCraft. Vivendi Games. Mission: The Trump Card (in English). 1998.
  13. StarCraft. Vivendi Games. Mission: New Gettysburg (in English). 1998.
  14. StarCraft. Vivendi Games. Mission: The Hammer Falls (in English). 1998.
  15. StarCraft. Vivendi Games. Mission: Among the Ruins (in English). 1998.
  16. StarCraft. Vivendi Games. Mission: Egression (in English). 1998.
  17. Chris Metzen, StarCraft Legacy staff. 2009-04-03. SC:L Metzen Interview - Lore Exclusive. StarCraft Legacy. Accessed 2009-05-18.
  18. 18.0 18.1 Furman, Simon (w), Federico Dallocchio, Carlos D'Anda (p, i). "StarCraft #7" StarCraft 1 (7) (January 20, 2009) DC Comics (Wildstorm).
  19. 19.0 19.1 Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Mission: Wings of Liberty, Haven's Fall (in English). 2010-07-27.
  20. 20.0 20.1 ((July 27, 2010) Blizzard Entertainment. StarCraft II: Wings of Liberty: Behind the Scenes bonus DVD (in English).
  21. Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Cinematic: Good Man. (in English). 2010.
  22. Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Mission: Wings of Liberty, Safe Haven (in English). 2010-07-27.
  23. Knaak, Richard A. (w), Washio, Naohiro (p, i). "Thundergod." In StarCraft: Frontline: Volume 1 (paperback binding), pp. 48–93. Tokyopop, August 1, 2008. ISBN 1427-80721-3.
  24. Mothership. Accessed on 2008-03-30
  25. Kindregan, Brian T. "Mothership." (January 15, 2010). Blizzard Entertainment. Mothership Accessed 2010-01-15.

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