Desert Dragons, Great Canal and Enchanted Land

Desert Dragons (13 VPs, not with Cities & Knights): dragons gather on the deserts after each settlement or city, then attack and block; Knight cards remove them; no robber, pirate or Largest Army. The Great Canal and The Enchanted Land need Cities & Knights (21 VPs with 3 players, 18 with 4): knights build the canal for chits, or beat dragons (1 VP each), winning at your sixth dragon.