As per title. I personally really enjoy deckbuilding / engine builders and civilisation games, but most of them understandably end just as you’re hitting the sweet spot of getting your engine up and running. Probably why Through the Ages is my favorite game - has all the mechanics I like, but lasts long enough that I feel like I get a chance to run them.
Mystic Vale is a neat take on the deckbuilder. Each player starts with the same 20-card deck, but Instead of earning new cards to add to your deck, you modify the cards themselves.
You add these clear plastic cards into the sleeve that add or modify one of three sections on your cards.