Another landscape idea that I'm trying to suss out. Inspired by Through the Ages as well as
this previous post by Tables.
WONDERS are super-projects that must be built in stages. Each wonder has multiple stage costs listed, and these must be bought in order. Each stage purchase requires a Buy, and multiple stages can be bought in the same turn using multiple Buys or split across turns. The project effect is activated only once the last stage is built. You can use the project cube to track which stage you're on. Like projects, multiple people can build the same wonder.
Below are a few draft examples, though still untested and the prices may be way off. Mainly curious as to what people think about the general idea. Is it intrinsically flawed, or can it be made to work?