A millennium ago, in reality 04 (Frontiers) Angemon and Angewomon used to be Lucemon´s greatest generals.
Until one day they met the 11th from the Ten Legendary warriors and realized how a madman was Lucemon.
When Lucemon was defeated by the Legendary 10, only the 11th survived.
Joining powers for the first time the generals and the new Great Angels (sorry for not drawing cherubimon but lacked space) , Shizuka Kimura did the last thing for the Digiworld:
And powers united, Nexus was summoned for the first time.
Nexus resurrected the dying reality and a new Reality 04 was formed…