As described in the Enuma Elish, when Anu and Ea procreated, they gave birth to the Iggiggi - the term for all of Anu's children and their descendents (which comprise most of the Nyrundian religious pantheon). All the gods from the prior generations are the Annunaki. Tiamat, Apsu, Lahamu, Lahamia, Anshar, Kishar, Anu and the 92 other Annunaki.
The One Hundred Annunaki sit as judges for the Gods. In their great hall, each of the one hundred sits and observes all of creation.When the Gods, Undergods, or those with claim beseech their court, and they agree to judge, each of the one hundred sit back and watch with their Vengeful Gaze of God. Each is a divine level 3 being (is worshipped in three importnat paralell primes). Using epic and divine powers (equivalent of 300 divine levels spread over shadow) they can view through the history of a claim during their judgment. Using their epic ritual version of True Sight in conjunction with the Venegful Gaze of God that each one can do (taking 200d6 in backlash when the power is used) independantly, they view through the history of the case and obliterate any creatures, objects, or places that they judge.
In the place where Satan and Grand Druids argue for souls. Anshar, Kishar, Anu, Lahamu, Lahamia, are present as part of the 100. Each have a single vote. Tiamat is the only of the Annunaki not present.