Gravemind

“I am a monument to all your sins.”

Biological Information
Height: 84.8 meters (279.8 feet)

Distinctions: Massive, with a head and many tentacles; long snake-shaped body; speaks in trochaic heptameter

Known Species: Flood

Notable Members: Gravemind

The Gravemind  (Inferi Sententia, meaning “Thinking Dead”), voiced by Dee Bradley Baker in the games, is the final stage in the life cycle of the Flood, and one of the main antagonists of the Halo series. It is a near-omniscient creature with complete control over all Flood forms.

Content Source: halo.wikia.com