There was another Dragon Knights castle?! 1906 Majisto's Tower is one of those wonderfully terrible mid 90's sets that Lego threw together from over produced parts and seemingly only released in America (
LEGO 1906 Majisto's Tower 100% Complete With Dragon Flag Wizard RARE | eBay
Majisto's Tower LEGO SYSTEM Castle Dragon Knights Set 1906 (1994) - YouTube