Editing Proto-Gravemind

{{Status|Canon}}
{{Flood infobox
|name=Proto-Gravemind 
|image=[[File:Protograve.png|350px]]
|height=Variable depending on creation stage
|distinctions=Large, with tentacles connecting the being to its surroundings
|species=[[Flood]] (various combined forms)
|attacks=Tentacles
|notable=
}}
The '''Proto-Gravemind''', also known as the '''Brain Form'''{{Ref/Book|Enc11|Page=167}} or the '''Proto-Compound Intelligence''',{{Ref/Game|CEA|Detail=[[Library (feature)|Library]]}} is an advanced [[Flood]] form created from the biomass of the most intelligent living organisms available, with the ultimate goal of creating a fully-functional [[Gravemind]]. Its creation allows the Flood to move from [[Feral Stage]] to [[Coordinated Stage]].{{Ref/Book|Bestiarum}}

==Overview==
===Creation and physiology===
Proto-Graveminds are created when the Flood has amassed sufficient bodies and minds to become sentient. In order to create a viable "mind", large numbers of Flood forms and corpses are merged into a globular mass, which uses the combined knowledge derived from each host. They are usually formed in order to handle advanced tasks, such as piloting a [[starship]], in which case Flood forms will merge as many hosts as possible with that knowledge, such as former pilots and officers. The Proto-Gravemind is stationary, and likely directs nearby combat forms to pilot the ships, similar to the way a fully-formed Gravemind will direct Flood forms to execute battle strategies or other complex tasks.{{Ref/Level|Id=keyes|CE|Keyes}}{{Ref/Anthology|Id=TML|Evo|The Mona Lisa}} 

Rather than completely destroying a victim's consciousness, as a normal Flood form generally does, it interrogates its victims slowly, even speaking telepathically to them, and allowing their nervous systems to feed it information. The form tortures the host's mind with a loud buzzing sound, thus erasing all thought. Only after the host is stripped of all knowledge is the host killed by the Proto-Gravemind, although it is sometimes possible for a host to die before the Flood form has a chance to assimilate all of its memories.{{Ref/Novel|Id=TF|TF}}{{Ref/Game|Id=terminal|CEA|Detail=[[Terminal (Halo: Combat Evolved Anniversary)|Terminal 9]]}}

[[File:CEABrainFormDecay.png|350px|thumb|Various human faces from left to right: being absorbed, recently absorbed, absorbed, slightly decayed, moderately decayed, severely decayed.]]
Unlike all other known Flood forms, Proto-Graveminds are immobile and passive in combat. They have never been observed to move on their own, even when combat forms are fighting nearby. In fact, even when [[John-117]] punched through the side of the Proto-Gravemind present aboard the ''[[Truth and Reconciliation]]'' during the [[Battle of Installation 04]], the Flood form did not react at all; it is likely that until the transformation into a true Gravemind is complete, Proto-Graveminds are nothing more than an amalgamation of inactive bodies. In most instances, they use some of their hosts' legs as a means to support themselves, and one can see some of the bodies of the most recently assimilated, embedded in the Proto-Gravemind's mass, albeit deformed.{{Ref/Reuse|keyes}} As the corpses become more deformed, a Proto-Gravemind's appearance take on a large body of Flood tissue and biomass.{{Ref/Reuse|TML}}

Proto-Graveminds are capable of jamming or distorting radio signals within a significant radius around them. The means by which they do this is unknown; however, it may be related to the unexplained telepathy the Flood use to communicate with one another. During the [[Battle of Trove]], a Proto-Gravemind was shown to be capable of both jamming a real transponder signal and replicating it from its own position to draw in nearby human forces.{{Ref/Level|Id=Flood|HW|The Flood (level)|The Flood}}

===Further evolution===
The Proto-Gravemind must grow incredibly in size to reach its next stage of evolution, known as a [[Gravemind]], a near-omniscient Flood form made of thousands of host bodies infused with the knowledge of each host that was used to make the Gravemind.{{Ref/Book|Id=art|AoH}} While a smaller Proto-Gravemind could direct combat forms, a larger Proto-Gravemind could be in control of multiple [[Flood colony|Flood colonies]] for coordinated gestation and attack on nearby life forms. The Proto-Gravemind and Flood colonies also become interdependent on each other; sending colonies into a dormant state would weaken the local Proto-Gravemind, while destroying the Proto-Gravemind would kill the colonies.{{Ref/Reuse|Flood}} Graveminds are created once a Proto-Gravemind reaches a certain "critical mass" and develops a centralized intelligence. 

Only two Graveminds are known to have ever been created; however, they seem to have the same memories, since the Gravemind present during the [[Human-Covenant War]] possessed detailed knowledge concerning the [[Forerunner-Flood war]] and even described the actions of the previous Gravemind during that time period as if they were its own.{{Ref/Level|H3|Cortana (level)|Cortana}}
<gallery>
File:Flood Brain Form.jpg|A small Proto-Gravemind onboard the ''Truth and Reconciliation''.
File:HW Protogravemind.png|A mid-sized Proto-Gravemind on the surface of the Etran Haborage .
File:HW2_LargeProtoGravemind.png|A large Proto-Gravemind, maturing into a [[Gravemind]], on [[Installation 00]].
</gallery>
{{clear}}

==History==
Proto-Graveminds have been encountered several times, in varying stages of size and potency.

The first recorded Proto-Gravemind was discovered on the surface planet of the Forerunner [[shield world]] [[Trove]] during a massive Flood outbreak in [[2531]]. Judging by its huge size and its connection to several [[Flood Colony|Flood colonies]], it is likely that this Proto-Gravemind was on the verge of becoming a Gravemind. This Proto-Gravemind was destroyed by UNSC forces led by [[Sergeant]] [[John Forge]] and [[Spartan-II]] [[Red Team]]. It had been duplicating Professor [[Ellen Anders]]' transponder signal to lure in the UNSC forces and infect them. After the Proto-Gravemind was destroyed, the {{UNSCShip|Spirit of Fire}}'s forces were able to detect Anders' real signal{{Ref/Reuse|Flood}} and follow it into the shield world itself.{{Ref/Level|HW|Shield World (level)|Shield World}}{{Ref/Level|HW|Cleansing}} Its remains were destroyed when the Etran Harborage was destroyed by the ''Spirit of Fire'' shortly thereafter.{{Ref/Level|HW|Escape (Halo Warslevel)|Escape}}

[[File:ProtoKeyes.png|thumb|250px|John-117 with the Proto-Gravemind onboard ''Truth and Reconciliation''.]]
During the [[Battle of Installation 04]] in [[2552]], John-117 found a Proto-Gravemind aboard the bridge of {{Pattern|Ket|battlecruiser}} ''[[Truth and Reconciliation]]''. The Proto-Gravemind would have allowed the Flood to use the ''Truth and Reconciliation'' to spread beyond Installation 04. It had assimilated [[Captain (NAVCOM)|Captain]] [[Jacob Keyes]] and attempted to learn from him the coordinates of [[Earth]]. Keyes fought with his willpower to prevent the Flood from gaining this information, burying the knowledge deep down within him and forcing the Proto-Gravemind to systematically discard every other memory he possessed.{{Ref/Reuse|terminal}} [[John-117]] arrived at the Proto-Gravemind just as the Flood form was about to finally extract the memory it wanted, and punched through the Captain's skull in order to retrieve his [[neural implants]], thereby robbing the Proto-Gravemind of the knowledge of [[Earth]]'s location for good. The Proto-Gravemind was destroyed shortly thereafter by the [[Covenant]] Special Ops as it was no longer present when human forces captured the ship.{{Ref/Reuse|keyes}}{{Ref/Reuse|TF}}

[[File:Legate.png|thumb|200px|left|The infected [[Minister of Etiology]], reduced to a disembodied head, while being absorbed into a Proto-Gravemind.]]
Another Proto-Gravemind was observed on the Covenant ship ''[[Infinite Succor]]'' during the concurrent [[Skirmish on Infinite Succor|Skirmish on ''Infinite Succor'']]. The biomass was made up of [[Unggoy]], Sangheili, human combat forms, and even animals from the ship's hunting preserve. The form was constructed in the ship's engine room, near the core, probably because the command center of the ship was not accessible to the Flood. Near the end of the battle, the Proto-Gravemind gained the ability to speak and spoke through the infected [[Minister of Etiology]]. This form was destroyed by [[Rtas 'Vadumee]] before it could pilot the ''Infinite Succor'' out of the system.{{Ref/Anthology|Evo|Story=[[The Last Voyage of the Infinite Succor]]}}

Yet another Proto-Gravemind was present on the [[prison ship]] ''[[Mona Lisa]]'' shortly after the destruction of Installation 04. Flood on board the ship were attempting to access the ship's FTL drive by collecting and absorbing the knowledge of UNSC pilots into this Proto-Gravemind. It was destroyed during [[Skirmish on Mona Lisa|the skirmish onboard]] when [[Ngoc Benti]] killed it with fragmentation grenades.{{Ref/Reuse|TML}}

After [[Voridus]] of the [[Banished]] [[Outbreak on Installation 00|released the Flood]] from [[High Charity]]'s crash site on [[Installation 00]] in [[2559]], a Proto-Gravemind quickly formed nearby. One of the tentacles blocked [[Pavium]]'s retreat{{Ref/Level|HW2|Section=Halo Wars 2: Awakening the Nightmare|SectionLinkText=Awakening the Nightmare|Fighting Retreat}} and its existence caused the Flood to develop greater coordination and sophistication as time went on, in particular recognizing the threat posed by the controls to reactivate the Ark's Sentinel defense network.{{Ref/Level|HW2|Section=Halo Wars 2: Awakening the Nightmare|SectionLinkText=Awakening the Nightmare|The Archive}} This Proto-Gravemind retained a measure of the deceased [[Gravemind]]'s intellect, but the Gravemind's new vessel had to feed and spread in order for the Gravemind to fully manifest once again.{{Ref/Game|HW2|Phoenix Logs|Detail=Proto-Gravemind}} By the time Banished forces discovered the Proto-Gravemind, it was very close to becoming a new Gravemind.  Pavium and Voridus led an assault on the creature, aided by the Ark's reactivated Sentinel defense network and [[Eklon'Dal Workshop Antlion]]s the Banished constructed nearby. After severely damaging the Proto-Gravemind, impairing its impending transformation into a Gravemind with each attack, the Banished were able to clear out a nearby Sentinel lock and summon a [[Retriever Sentinel]]. With the help of the added firepower of the Retriever, the Banished were able to kill the Proto-Gravemind. With the Proto-Gravemind dead, the Banished and the Ark's Sentinels were finally able to contain the Flood outbreak.{{Ref/Level|HW2|Section=Halo Wars 2: Awakening the Nightmare|SectionLinkText=Awakening the Nightmare|Manifestation}}

==Gameplay==
===''Halo: Combat Evolved''===
The Proto-Gravemind first appeared in the ''[[Halo: Combat Evolved]]'' campaign level ''[[Keyes]]'', as a part of the level's Binary Space Partitioning geometry. Although it moves slightly in its place, it does not offer gameplay interactions and cannot be damaged in any way. 

===''Halo Wars''===
The main objective of the ''[[Halo Wars]]'' campaign level ''[[The Flood (level)|The Flood]]'' is destroying the Proto-Gravemind, which is known in-game as a Flood building under the name "Flood Boss". By attacking the Flood colonies throughout the level and sending each into a dormant state, the Proto-Gravemind could be attacked in a weakened state. This may not be necessary, particularly on the lower difficulties. Players could launch a direct attack on the Proto-Gravemind with all of their forces. With upgraded leader powers, particularly the Carpet Bombing and forces mainly made up of Hornets, players could destroy the Proto-Gravemind without much difficulty.

===''Halo Wars 2''===
The Proto-Gravemind in the ''[[Halo Wars 2: Awakening the Nightmare]]'' level ''[[Manifestation]]'', which is far bigger and more powerful than the ''Halo Wars'' Proto-Gravemind, requires more complicated tactics to defeat. There is also a time limit as the player only has a certain amount of time until the Proto-Gravemind reaches critical mass and becomes a [[Gravemind]]. Each time the creature takes damage, the percentage until critical mass drops. First, the player needs to clear out a nearby Flood base and build a Banished Minibase with a [[Eklon'Dal Workshop Antlion|Mega Turret]]. The player must spot the three nearby tentacles so that the Mega Turret can clear them out for the Banished forces to proceed to the creature itself. Before clearing out the tentacles completely, the player should build up their chosen forces to the maximum and upgrade them as far as possible. After reaching the creature, the player must clear out a nearby Flood base and plant a Minibase with a Mega Turret to attack the Proto-Gravemind, causing it to rise up out of the ground, rendering it vulnerable to attack. While fighting off defending Flood forces, the player must target the carapace on the side of the Proto-Gravemind and after blasting through it, attack the exposed sacs. After the sacs are destroyed, the Proto-Gravemind will expose its core, which must then be targeted until it retreats and seals itself off. The player must repeat this twice, but on the third time, the Proto-Gravemind will not expose its core, as it has become too strong and the Mega Turrets no longer have an effect. On [[Pavium]]'s orders, the player must clear out a nearby Sentinel lock which will summon a [[Retriever Sentinel]] that will then be under the player's control. Dodging Flood attacks, the player must focus all Banished fire, bolstered by the Retriever, upon the Proto-Gravemind until it exposes its core. Once it is exposed, target the core until the Proto-Gravemind is killed. This time, the Proto-Gravemind will not retreat when its health is depleted though the player must continue to avoid the Flood forces sent to defend it. Throughout this, the player must build new forces to replace those that they have lost to aid in the attack on the Proto-Gravemind.

==Trivia==
*Ironically, the Proto-Gravemind was originally called "The [[Librarian]]".<ref>[http://halo.bungie.net/News/content.aspx?type=topnews&link=Feast_of_Bones ''Bungie.net'': Feast of Bones]</ref>
*In the campaign level ''[[Keyes (level)|Keyes]]'', the original idea was for John-117 to burn Keyes's skull out of the Proto-Gravemind. However, the idea was scrapped when the [[M7057 flamethrower|flamethrower]] was removed from the Xbox version of the game due to time constraints.{{Ref/Reuse|art}}
*The Proto-Gravemind in ''Halo: Combat Evolved'' has [[seven]] tentacles.
*When the Proto-Gravemind in ''Halo Wars'' is destroyed, it will spurt liquid everywhere. It is possible that Flood biomass functions like a water balloon, having a solid exterior and being filled with liquid.

==Gallery==
{{Linkbox|gallery=yes|gallerypage=Images of Proto-Graveminds}}
<gallery>
File:HCE_ProtoGravemind_Concept.jpg|Early concept art of a Proto-Gravemind.
File:HCE - John killing Keyes.png|John-117 punches Keyes who was assimilated into a Proto-Gravemind in ''[[Halo: Combat Evolved]]''.
File:Proto-Gravemind.png|A Proto-Gravemind in ''[[Halo Legends]]:'' ''[[Origins]]''.
File:TML - engine room.png|A Proto-Gravemind in the engine room of the ''[[Mona Lisa]]'' in ''[[The Mona Lisa]]''.
File:HCEA Proto-Compound Intelligence.png|A proto-Gravemind in ''[[Halo: Combat Evolved Anniversary]]''. 
File:Keyes Protogravemind.jpg|A Proto-Gravemind in [[Terminal (Halo: Combat Evolved Anniversary)|''Halo Combat Evolved: Anniversary''<nowiki>'s</nowiki> terminals]].
File:CEA Keyes Death.jpg|Jacob Keyes' face absorbed into the Proto-Gravemind.
File:HW2_GravemindTentacles_Concept.jpg|Concept art of the Proto-Gravemind's tentacles in the mission [[Manifestation]].
File:HW2_ProtoGravemind_Concept_1.jpg|Concept art of the Proto-Gravemind in ''Halo Wars 2''.
File:HW2_ProtoGravemind_Concept_2.jpg|Concept art of the Proto-Gravemind in ''Halo Wars 2''.
File:HW2_GravemindTentacles.jpg|One of the Proto-Gravemind's tendrils.
File:HW2 PhoenixLog Proto-Gravemind.png|A large Proto-Gravemind in ''[[Halo Wars 2]]''.
File:HW2-Manifestation.png|[[Pavium]], [[Voridus]], and a large number of Unggoy stand before one of the Proto-Gravemind's tentacles.
File:HW2-Victoryscreech.png|Pavium and Voridus let out a victory roar after killing the Proto-Gravemind.
File:HW2-Protogravemind&Lich.png|The dead Proto-Gravemind seen from above.
File:HW2-Atriox&Protogravemind.png|Atriox stands before the dead Proto-Gravemind.
</gallery>

==List of appearances==
*''[[Halo: Combat Evolved]]'' {{1st}}
*''[[Halo: The Flood]]''
*''[[Halo Graphic Novel]]''
**''[[The Last Voyage of the Infinite Succor]]''
*''[[Halo Wars]]''
*''[[Halo Legends]]''
**''[[Origins]]''
*''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''
**''[[The Mona Lisa]]''
*''[[Halo: Combat Evolved Anniversary]]''
**''[[Terminal (Halo: Combat Evolved Anniversary)|Terminals]]''
*''[[Halo: Primordium]]''
*''[[Halo Wars 2]]''
**''[[Halo Wars 2: Awakening the Nightmare|Awakening the Nightmare]]''

==Sources==
{{Ref/Sources}}

{{Flood}}
{{HW buildings}}
[[Category:Flood forms]]
[[Category:Bosses]]