(as seen on the back of the 1E MM)
The two wizards waited on a ledge high up on Fang Mountain for days. The wind and rain had almost swept them to their deaths several times. A fire was a pointless endeavor, so they ate their meals cold.
“Where in the eleven Hells is your brother?,” one mage asked the other cheerlessly.
“He will be here,” answered the other hopefully.
Another day passed by. Madness was about to set in. Then a high-pitched whistling could be heard and a ladder descended from a passing cloud.
“You see?,” replied one wizard to the other, “my brother has arrived to take us from here to safety and back to our homeland.”
“None too soon,” replied the other mage, “we will give him some of the wine we found in that stash in the bandits’ cave. It looked good still.”
Later that night the wizard of the sky castle popped the cork on a bottle of the gift wine and drank deeply. The castle suddenly slowed to a halt and the stones and mortar separated. As the wizards plunged to earth they all came to a terrible conclusion: the wine was poisoned.
Sky Castle (Arcane)
Duration: Permanent until destroyed or at the death of the spellcaster
When cast, Sky Castle creates a huge airborne castle to come into existence on a cloud. This ancient spell is best conjured on a mountaintop as the cloud becomes as permanent as the stone and mortar of the castle, which can take up to 400 hit points worth of damage, at which time the airborne castle will fall earthward as its supporting cloud dissipates. The same happens when the owner of the cloud castle dies; the stones and all of the contents of the castle come crashing to the ground. The mage casting Sky Castle may transfer ownership of his or her creation to another intelligent being and the castle will change its configuration to suit the new owner’s size and taste (i.e. a human wizard could give a Sky Castle to a Cloud Giant and the castle would alter itself to accommodate the larger sized creature or vice versa), but a wizard may only create one Sky Castle at a time, even if one is given to another person/monster/etc it counts as being created by the mage who cast the spell. The owner of the castle can cause the airborne mansion to hover motionlessly or to travel up to a speed of 40′ per round. The Sky Castle can descend to the ground (ladders/rope would be needed to touch the earth due to the thickness of the cloud) or raise as high as one mile into the sky. The cloud can also be piloted to other planes of existence or can be set upon water to float aimlessly upon the seas and oceans of the world. Lightning and severe storms pose a real danger to the Sky Castle’s inhabitants, as does a fall from the cloud that this magical building rests upon. There is no natural protection to keep winged creatures, air elementals or troublesome deities from landing on the cloud that supports the Sky Castle, but weapons that protect normal castles, such as catapults and stone throwers, can be kept handy to deter invasion.