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They have never been observed to keep any of their hosts' or weapons. They have never been observed to move on their own, even when other Combat Forms are fighting nearby. Unlike other Flood Forms, it is apparently immobile and passive in combat. Very little is known about the Proto-Gravemind, also known as a Brain Form. The Carrier Form is a type of normal Flood form primarily used to both create and transport Infection Forms thus effectively spreading the Flood infection. They coordinate attacks on certain enemies by a Gravemind, if there is one. The victim is mutated into a combat unit that fights for Flood goals and objectives. A possible flaw in its AI is that it has been observed to rarely attack players, and normally prefers to mutate itself into one of the two other Pure Forms.Ī Flood Combat Form is a vertebrate suitable for combat that has been infected by the Flood parasite via an Infection Form. They are able to crawl on walls and ceilings with ease, and are capable of doing enormous jumps much like combat forms. This form sits low beneath your field of view and their attacks can go widely unnoticed until you look down. It will frequently mutate into either a Ranged Form or a Tank Form when the need arises. It is apparently made from the re-casted bones of dead enemies. The Flood Stalker Form is a crustecean-like Flood Pure Form that specializes in stealth and agility. They also occasionally spew Infection Forms from their 'mouths'. These Flood can take a tremendous amount of damage and can kill you in one hit in higher difficulties. Unlike the other Flood Pure Forms, they can not climb on walls and ceilings. To fully disable them the player must stop firing until they reveal their weak point once more, or continue firing until they die, regardless of their defensive posture. When fired upon these forms will curl up to shield their heads, their weak point. They also exhibit a behavior unlike any other in the Flood arsenal. These spikes will relentlessly pelt the player if exposed. It has a mouth-like protrusion that opens up to reveal a living missile platform of regenerating spikes. It is formed when a Flood Stalker Form is damaged or chooses to mount itself in a stationary position either on the walls, ceiling, or, with less frequency, on the ground. The Flood Ranged Form is a type of Flood Pure Form from Halo 3. The Flood Infector Form is a Flood Pure Form that was cut from the retail version of Halo 3 and appears only in The Art of Halo 3 book.
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Shielde carrier forms are a variant of Flood Carrier Forms with Jackal Point Defense Gauntlets. They also can jump much higher and further than the regular Combat Forms. The Juggernaut has two extremely large tentacles that can kill the player with only one hit. The Flood Juggernaut is the name of a large Flood form found encoded in the Halo 2 disc.
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