I've been looking through my old LEGO collection and rebuilding a few choice sets. This castle is '6087: Witch's Magic Manor' from Fright Knights (1997/8) although I didn't know it then! a
LEGO 6087 Witch's Magic Manor - YouTube
Buy the Lego System Witch's Magic Manor Set 6087 IOB | GoodwillFinds
Buy the Lego System Witch's Magic Manor Set 6087 IOB | GoodwillFinds
Lego Classic Green Dragon Figure w Red Wings, 6056 6076 6082 6087 Vintage Knight | eBay
LEGO 6087 Witch's Magic Manor Set Parts Inventory and Instructions - LEGO Reference Guide