Complex sentence: After Blavatsky's death in 1891, numerous individuals have claimed to be in contact with her Adept Teachers and have stated that they were new "messengers" of the Masters conveying various esoteric teachings.
Split into simpler sentences: After Blavatsky's death in 1891, numerous individuals have claimed to be in contact with her Adept Teachers. These indivuduals have stated that they are new "messengers" of the Masters and they have conveyed various esoteric teachings.