The Graveward

The Graveward is an Eridian lifeform lying dormant within the Vault on Eden-6.

Involvement
Kept secret by the Jakobs Corporation, the Graveward lay undisturbed for centuries in a Vault underneath the Jakobs Estate. They were subsequently assaulted by the Children of the Vault, who were tasked with seeking it out.

The Calypso Twins, whilst they weren't aware of what it contained, hoped to lure the Crimson Raiders into killing whatever resided in the Eden-6 Vault in the hopes of absorbing its power. However, after the Graveward was defeated, Patricia Tannis used her Siren powers to nullify its remaining energy to prevent Tyreen from harvesting it.

Trivia

 * Unlike The Warrior, it is unclear what the Graveward's purpose is, although it may be responsible for the verdant nature of Eden-6.