|Race||Disembodied Thinker (Primordial)|
|Birthplace||Sea of Entropy|
|Born||3 Temporal 1487 DE|
|Died||29 Lunar 1501 DE|
Eysveig was a disembodied thinker. He was created in the Creation War (1486 DE - 8777 DE) by the Nine-Tongued Worm. Like other disembodied thinkers, he was made to help manage the vast numbers of troops under his master and to coordinate their activities in a conflict spanning systems and worlds.
Eysveig's brain was composed of hundreds of brains merged together. She is a lesser version of the disembodied thinker Ingu'lumin; made that way, with Nine-Tongued Worm not wanting another minion smarter than himself.
Typically, one brain showed dominance over the others, slowly consuming the others, and adding their brain power to its own. The disembodied thinker was then exposed to some force, perhaps psionic, which lobotomized the brain to a point where it was subservient to a primordial master.
In the Creation War, Eysveig saw action on the continent Šadullu. While marshaling an army of storm archons for an attack on Tiwa'erra, his spies captured a Covenant agent named Buldapulax. In Eysveigs Infirmary, this hapless victim ended up becoming a primordial like his captors.
On 29 Lunar 1501 DE, the Covenant general Ptah destroyed Tiwa'erra, along with Eysveig and his army of storm archons. A few parts of Eysveig's brains survived Tiwa'erra's implosion. Collected by his minions, they were taken to Eysveigs Infirmary where they led to the creation of the Grell race.