The nine are gods. Osiris found out about them and was exiled by the speaker (he is nine). Xûr is a zombie of toland the shattered, controlled by the nine to spy on us. The cabal are running from the nine. The vex are evil, except the ones in the VoG. The black heart is nine. The only way to defeat the nine is to get Athlon out of the VoG, have him turn mercury into a machine, and destroy the solar system.