Dragonwall

A dragonwall is a major working of magic in a city or castle to deal with the main problem a walled city has in a world where things fly. No roof.
A dragonwall is usually worked into the walls of a city or castle. Under the correct circumstances, usually the gates being locked, a magical dome of force comes into being over the city or castle. 
Said dome of force will allow the sun, rain, and wind to pass normally, but will stop fire, missiles, or creatures from passing through it. Even dragons cannot overcome this protection, hence the name.
Typically the only way to dispel a dragon wall is to unlock the gates or damage the walls of the protected area sufficiently to destroy the enchantment.
Two Greyhawke locations are known to have a dragonwall. The Cities of Seahaven and Eyrie Keep.
Category:Greyhawke
Category:Supernatural
Category:Lexicon