In his book of prophecies, towards the end of a series of bewildering prophecies about Arthur and his British successors, he gets even weirder and goes into a prophecy that, whatever its specific meaning, certainly must portend the end of the world. One thing is clear: they mainly pertain to a cataclysmic celestial event, since there are quite a few astrological references. However, rather than my trying to interpret its meaning, I shall simply present them for your consideration and allow Merlin to relate his warning to you in his own words:
In the wrath of the stars shall the standing corn be withered and the dews of heaven shall be forbidden to fall.
Root and branch shall change places, and the newness of the thing shall be as a miracle.
The shining of the sun shall be dimmed by the amber of Mercury, and shall be a dread unto them that behold it.
Stilbon of Arcady shall change his shield, and the helmet of Mars shall call unto Venus. The helmet of Mars shall cast a shadow, and the rage of Mercury shall overpass all bounds.
Iron Orion shall bare his sword.
Phœbus of the ocean shall torment his clouds.
Jupiter shall trespass beyond his appointed bounds, and Venus forsake the way that hath been ordained unto her.
The malignity of Saturn the star shall fall upon earth with the rain of heaven, and shall slay mankind as it were with a crooked sickle.
The twice six houses of the stars shall mourn over the wayward wandering of their guests.
The Twins shall surcease from their wonted embrace, and shall call the Urn unto the fountains.
The scales of the Balance shall hang awry until the Ram shall set his crooked horns beneath them.
The tail of the Scorpion shall breed lightnings, and the Crab fall at strife with the Sun.
The Virgin shall forget her maiden shame, and climb up on the back of the Sagittary.
The chariot of the Moon shall disturb the Zodiac, and the Pleiades shall burst into tears and lamentation.
None hereafter shall return unto his wonted duty, but Ariadne shall lie hidden within the closed gateways of her sea-beaten headland. In the twinkling of an eye shall the seas lift them up, and the dust of them of old again begin to live. With a baleful blast shall the winds do battle together, and the sound thereof shall be heard amongst the stars.’