This can only mean Enoch himself. Next, they marked their repository with the Sphinx. When the contents of this cache are revealed, say the prophecies, it will bring terror and chaos to the existing world order. Materialism will no longer be king. Terror will be king.
Terror can certainly mean chaos, degeneracy.
This, however, may not be quite what Nostradamus had in mind. Terror' also represented Jesus' most secretive teachings which were believed to be stored at Rennes. In the unique Holy Grail legend which was passed along the French country side where Nostradamus lived, the Grail story was dictated by Jesus to a young Frenchman. When this young man held the Grail in his hand, and looked into its bright light, he became instantly horrified, then enlightened. This links Jesus with terror and enligtenment.