Cornelius, the all-consuming, once god of magic, is now sole ruler of the Void, the preternatural force of creation and destruction. He resides exclusively on the flying isle of Fanamar, home of the Order of the Abyss and nexus of the five Altars of Magic.
His Order is one of the eldest and fewest in number, with rarely a new soul admitted in the last six centuries. Its agenda is rarely known to the rest of the world, but its members all carry a mark of their patron.
Those who have borne the mark of Cornelius openly include:
Maximillian, erstwhile Guildmaster of the Bards.
Zheredan, rogue mage/seer, early Priest of magic, and erstwhile Baron of Parrius.
Cordon, First Truemystic and erstwhile Guildmaster of the Astrologers.
Erev, Truemystic and erstwhile Guildmaster of the Astrologers.
Tleilaxu, early Oracle Seer.
Goten, erstwhile Guildmaster of the Necromancers.
Narissa, erstwhile Princess of Thakria and Guildmistress of the Thieves.
Illyism, erstwhile Guildmaster of the Bards and Baron of Mercinae.
Gandalph, early Elementalist Wizard and Warlock and Guildmaster of the Warlocks.
Agarwain, erstwhile Prince of Parrius and first High Priest of Magic.
Mysterin, Guildmistress of the Astrologers.
Salvador, erstwhile Prince of Thakria, and ordained as Elmaethor, god of the stars.
Dakh, erstwhile Guildmaster of the Sorcerers and Thaumaturgist.
Kerenas, erstwhile Guildmaster of the Seers and Truemystic.
Necrophona, erstwhile Queen of Thakria, Priestess, and Founder of the Sirens Guild.
Judging by history, Cornelius and his followers have no consistent theme or ambition -- truly a league of the unknown -- nor, it seems, do they follow any rules. They have a love for causing friction; their motives are frequently at odds, they war openly amongst each other, without semblance of choreography or comraderie, and their unity is only apparent during religious war, festivals, and acts of piety. What can be said is that the followers of Cornelius unerringly make a mark on the world, but how each one will do so remains a mystery to all but their patron.