Editing Sarcophagus

{{Era|Forerunner|HCW|Post}}
{{Megastructure infobox
|image=
|description=[[Dyson sphere|Dyson shell]] with a terrestrial surface
|location=[[Zeta Doradus system]]
*Formerly within a slipspace field in [[Onyx]]
|type=[[Shield world]]
|function=Preservation of lifeforms from the [[Halo Array]]'s pulse
|caretaker=
|constructed=
|destroyed=
|diameter=Approx. 2 [[Wikipedia:Astronomical unit|AU]] (300,000,000 km)
*[[Slipspace bubble]]: 23 cm <ref name="glass230">'''Halo: Glasslands''', ''page 230''</ref>
|surface width=Approx. 255 quadrillion km<sup>2</sup>
|surface width-title=Surface area
|gravity=1.37 solar masses <ref name="glass230"/>
|gravity-title=Mass
|surface temperature=
|atmosphere=
}}
'''ONI Research Facility Trevelyan''',<ref name="glass397">'''Halo: Glasslands''', ''page 397''</ref> ('''ONIRF Trevelyan'''), named by its [[Forerunner]] creators as '''Shield World 006'''<ref name="SW 006">'''Halo: The Thursday War''', ''page 120''</ref> or the '''Sharpened Shield''',<ref name="enc">'''[[Halo Encyclopedia]]''', ''page 301'' (2011 edition)</ref> is a Forerunner [[shield world]] formerly located within the artificial planet [[Onyx]] in the [[Zeta Doradus system]]. At approximately two astronomical units in diameter and weighing approximately 1.37 solar masses,<ref name="glass230"/> the sphere is the largest known megastructure created by the Forerunners, and possibly the largest artificial structure in the galaxy. It would be appropriated in [[2553|March 2553]] by the [[United Nations Space Command]] and renamed in honor of the late [[Kurt Ambrose|Kurt Trevelyan]].<ref name="glass397">'''Halo: Glasslands''', ''page 397''</ref>

==Overview==
Shield 006 is a [[Dyson sphere|Dyson shell]], a massive artificial structure encircling a star. According to [[Catherine Halsey|Dr. Catherine Halsey]]'s calculations, the internal surface area of the sphere is approximately 500 million times the surface area of [[Earth]], or around 255 quadrillion km<sup>2</sup>. When residing in a [[slipspace bubble]] of compressed dimensionality, the shield world's apparent diameter to an outside observer was only about 23 centimeters. Inside the slipspace bubble and in normal space, however, the sphere is approximately twice the size of Earth's orbit.<ref name="glass230"/> The exterior surface of the sphere is entirely featureless, and has been described as being chocolate-brown in color.<ref name="glass378">'''Halo: Glasslands''', ''page 378-379''</ref> 

The observed portion of the interior surface of Shield World 006 is rolling hills and verdant forest, with several large cities in between.<ref>'''Halo: The Thursday War''', ''pages 271, 274''</ref> As the Forerunners never arrived, the shield world is entirely maintained by [[Huragok]] and [[Sentinel]]s, including cylindrical drones tasked with monitoring for signs of [[Flood]] infection.<ref>'''Halo: The Thursday War''', ''page 272''</ref> The Dyson sphere's default environmental conditions are suitable for [[Earth]]-based life, but the climate settings could be adjusted for other species' requirements.<ref>'''Halo: Glasslands''', ''page 271''</ref><ref name="enc"/> The sky inside the shield world appears solid blue; the landscape on the other side of the sphere is not visible as a result of the shield world's enormous scale, unlike on smaller shield installations such as [[Shield World 0459|Shield 0459]]. However, the concave curvature of the horizon can be detected with a [[telescopic sight]].<ref>'''Halo: Ghosts of Onyx''', ''page 380''</ref>

There are two known sections of the shield world. The [[Citadel (Trevelyan)|Citadel]] is an urban habitat that served as the base camp for [[Blue Team]] for the majority of their time in the shield world.<ref>'''Halo: Glasslands''', ''page 280''</ref> Another section, known as the [[Sarcophagus]], is essentially a garage filled with numerous Forerunner transports and vehicles.<ref>'''Halo: Glasslands''', ''page 190''</ref> The Sarcophagus also contained a control room. It was in this section that [[Lucy-B091]] discovered several [[Huragok]] maintenance personnel, and successfully communicated with [[Prone to Drift|one of them]]. Numerous other structures are scattered around the landscape, including towers responsible for environmental maintenance and atmospheric control.<ref>'''Halo: The Thursday War''', ''pages 273-275''</ref> Some of the structures are home to [[slipspace portal]]s which link not only to locations within the sphere, but also other worlds,<ref>'''Halo: The Thursday War''', ''page 409''</ref> including [[Hesduros]].<ref>'''Halo: The Thursday War''', ''page 398''</ref> However, since the status of many of the facilities in the portals' receiving ends is unknown, travel through them was advised against by the Huragok.<ref>'''Halo: The Thursday War''', ''page 278''</ref>

While contained in slipspace, access to the shield world could only be obtained through a small portal, which was located inside an [[core room antechamber|antechamber]] in the core of the artificial planet Onyx. The portal was only active for a limited amount of time after the [[Halo Array]] had been put into standby mode.<ref>'''Halo: Ghosts of Onyx''', ''page 311''</ref><ref>'''Halo: Glasslands''', ''chapter 10''</ref> Some time after the portal had been deactivated, the Huragok crew transitioned the shield world back into normal space once they had been assured that there were no longer any threats to the shelter.

==History==
===Early history and battle===
The most technologically impressive of all shield worlds encountered in the modern era, Shield World 006 was constructed as part of the [[Ur-Didact|Didact]]'s shield world defensive plan before the [[Forerunner-Flood war]]. This shield installation in particular was designed as a fallout shelter from the [[Halo Array]], a competing strategy advocated by the [[Builder]]s. Several slipspace portals on the interior of the structure were linked to major Forerunner worlds, in order to facilitate their evacuation before the Array fired; one such world was [[Kelekos]].
  
Near the end of the [[Battle of Onyx]] on [[2552#November|November 3, 2552]], Covenant [[Fleet Master]] [[Voro Nar 'Mantakree]] led his forces in an attempt to access the Sharpened Shield. However, [[SPARTAN-II program|Spartan]] [[Kurt Ambrose]] detonated a pair of [[FENRIS nuclear warhead]]s within the core room antechamber after his comrades had passed through the portal, denying the Covenant access.<ref>'''Halo: Ghosts of Onyx''', ''page 372''</ref> The human survivors, including SPARTAN-II [[Blue Team]], several [[SPARTAN-III Program|SPARTAN-IIIs]], Dr. Catherine Halsey, and [[Senior Chief Petty Officer]] [[Franklin Mendez]], were then seemingly trapped within the shield world. Shortly thereafter, the installation's [[Onyx Sentinel|Sentinels]] destroyed the artificial surface of Onyx.<ref>'''Halo: Ghosts of Onyx''', ''page 378''</ref>

When inside the shield world, the human survivors managed to establish contact between the ONI ships outside the sphere, which had already detected the cyclically fluctuating anomaly caused by the slipspace bubble but had no means to access it.<ref name="glass230"/> In [[2553#February|February 2553]],<ref name="glass372">'''Halo: Glasslands''', ''page 372''</ref> the shield world was eventually brought back into normal space by a group of [[Huragok]] that the Forerunners had left behind to maintain the structure. There was a considerable difference in the passage of time between the slipspace bubble and real space; while the survivors inside the sphere had only experienced several days, approximately three months had passed on the outside.

===Emergence from slipspace and ONI takeover===
Once the Sharpened Shield had been brought back into normal space, the ONI team [[Kilo-Five]] entered the sphere. A strip of multi-colored lights activated to guide their dropship to the designated coordinates, where they would land on the surface of the shell. After a momentary blackness and a disorienting sensation for the occupants, they found themselves and their ship inside the Sarcophagus facility's hangar.<ref name="glass378"/> Halsey and the surviving Spartans were then rescued from the shield world, but she was immediately arrested by [[Captain (Navy)|Captain]] [[Serin Osman]] for "committing acts likely to aid the enemy".

Immediately afterward, ONI established a base of operations near the access portal to the sphere,<ref name="glass397"/> which was named "Trevelyan" in honor of Kurt-051, whose sacrifice allowed humanity to access it.<ref name="glass372"/> ONI's research facility was used to gather information on the vast installation, as well as to obtain usable Forerunner technologies.

Days later, the former [[Shipmaster]] [[Jul 'Mdama]], detained by [[Kilo-Five]], was placed in captivity on Trevelyan at the behest of Dr. [[Irena Magnusson]] in order to use him in ONI's experiments; however, several days later, the Sangheili escaped via a local [[slipspace portal]]. The incident resulted in ONI commander-in-chief [[Admiral]] [[Margaret Parangosky]] personally relieving Dr. Magnusson of duty and replacing her with [[Hugo Barton]] as the facility's director.<ref>'''Halo: The Thursday War''', ''page 407''</ref> By [[2558]] the facility housed a [[Spartan (branch)|Spartan]] garrison of unknown size.<ref>''Halo 4'', [[MJOLNIR Powered Assault Armor/Defender|MJOLNIR/Defender]] armor description</ref>

==Research==
One of the Trevelyan site's primary purposes was to experiment on genetically modifying the Sangheili grain known as [[irukan]], with the goal of creating a bioweapon to be unleashed against the Sangheili as a backup plan in the event ONI's strategy to destabilize them failed. To accelerate the growth of the crops, ONI had the facility's resident [[Huragok]] create [[slipspace bubble]]s in which time passed faster than in normal space, much like the dimensional bubble the shield world itself used to inhabit.<ref>'''Halo: The Thursday War''', ''pages 138, 205''</ref>

Following the establishment of the research facility, numerous discoveries of records and technology were made within the shield world. Significant finds included the [[Halo: Cryptum|Bornstellar Relation]];<ref>'''Halo: Silentium''', ''page 12''</ref><ref>'''Halo: Primordium''', ''page 230''</ref> the remains of a [[Catalog]] carapace, (designated "Forerunner remains #879"), including the desiccated, malformed corpse within; a fossilized [[Juridical]] accompanied by a [[monitor]] with [[Halo: Silentium|an account]] of the last days of the Forerunner-Flood war;<ref>'''Halo: Silentium''','' Prologue''</ref> and the [[Forerunner personal armor|personal armor]] of a latter-day Forerunner [[Prefect]].<ref name="worthplaying">[http://worthplaying.com/article/2013/7/6/news/89850/ '''Worthplaying:''' '''Halo 4' (X360) Champions Bundle To Add New Maps, Mode, Skins, Armor, Bonus Upgrades - Screens'']</ref> All of these discoveries were studied extensively, with the Bornstellar Relation and the monitor's accounts giving a great deal of insight into Forerunner history and society. Matériel discovered on Trevelyan soon led to new technological developments, such as [[MJOLNIR Powered Assault Armor/Prefect|a variant]] of [[MJOLNIR Powered Assault Armor (GEN2)|MJOLNIR (GEN2)]] that ONI's [[Watershed Division]] and local Huragok reverse-engineered from the Prefect's armor.<ref name="worthplaying"/>

==Trivia==
*"The Sharpened Shield", a name used for the shield world in the ''[[Halo Encyclopedia]]'', was originally a fan-made name used on ''Halopedia''. The name had never been used in any official ''Halo'' media, though it was seemingly based on the line, ''"And bless the Reclaimers that may take refuge behind the sharpened edge of the Shield,"'' from ''Halo: Ghosts of Onyx''. For more information, see [[Talk:Sharpened Shield#Name v2|this discussion]]. In ''Halo: The Thursday War'', the installation is identified as Shield World 006,<ref name="SW 006"/> which more closely matches the naming scheme [[Shield World 0459|established]] in ''[[Halo: The Essential Visual Guide]]''.
*Collectively, the shield world's Forerunner and human designations are a reference to the James Bond film [[Wikipedia:GoldenEye|''GoldenEye'']]. Alec Trevelyan, the film's antagonist, is a former 00 agent; his code number was 006.

==List of appearances==
*''[[Halo: Ghosts of Onyx]]'' {{1st}}
*''[[Halo: Glasslands]]''
*''[[Halo: The Thursday War]]''
*''[[Halo 4]]'' {{Mo}}
*''[[Halo: Silentium]]'' {{mo}}
*''[[Halo: Mortal Dictata]]'' {{mo}}
*''[[Halo: Hunters in the Dark]]'' {{Mo}}
*''[[Halo 5: Guardians]]''
**''[[Halo 5: Guardians Limited Edition|Limited Edition]]'' {{Mo}}

==Sources==
<references/>

{{Forerunner|array}}
[[Category:Forerunner installations]]
[[Category:Onyx]]