
Add resource exploration buildings.
Now, you can place resources. (Stone, Iron, Gemstone)

Add Large Well, effective during droughts.
Add Fire Station, recruit a firefighter who moves faster, and puts out the fire faster.

Change what traders sell and buy.
And change the prices of resources.
Some merchants sell tools or magic tools.

Add new recipes of the luxury workshops (sculpturer, brewery, perfumer, etc)
Produce a lot of luxuries for your citizens.