>>11530440
There are no instructions. So you could look at pictures from the castle inside and out https://www.bricktastic.nl/lego-ideas/lego-ideas-project-castle-of-lord-afol-and-the-black-knights-bereikt-10-000-stemmen/
and start reverse engineering it. You can try to start building it with the parts you have and come up with your own solutions if you don't have the same parts or you order the missing parts online.