I’m planning on adding Marvels real soon, and so far this is what I’ve come up with for how it’ll go. As you can see, the Marvels without any arrows drawn to them will be initially available for purchase. Some marvels require another or more marvels to be already built before they can be subsequently built. It’s something like a tech tree, and it makes it easy for me to know what needs what. Just thought I’d share :)
