Hi, to all ninjago fans from Staslegomaster. I like Ninja sets since 1998. I know, there’s no instruction how to combine ninjago sets 2504, 2519, 2520, 2254 into a super arena. Perhaps because it‘s obvious how to do it. I’m sure if one creates Battle arena 2520, then the passage on the right will look like a red-eyed skull, there’ll be a stand for weapons below and a red passage on the left. Skeleton bowling 2519 is attached so that the red passage becomes the entrance. Instead of the stand for weapons we put 2504(dodju spinjitsu) so that its gates become the arena’s entrance. There are special pieces at the edges of the sets. But I don’t know what to attach to the red passage to finish the super arena. Can it be 2254 ? I don’t have it, so I’m not sure. Or an exclusive set? Try to create it and put its pictures here.These are old sets but digital design can help. Hope you like the idea/Thanks a lot.