u/Dry-Chocolate-9305

I ran the Cataclysm of Kang, and we loved that it was like a DnD long-form, various increasing ranks adventure. But it seems that CoK is a one-off, as the rest of the adventures created are more one-shots. I see there are many Expansions, but I am unsure how to use them to create an adventure like CoK.

So.. how do you use an Expansion? How do you use it to create a long-form adventure? Or am I missing the point of an Expansion?

Any and all help and suggestions are greatly appreciated.