Some of the Teaser cards: Patron has "reveal" in quotations, Scepter, Capitalism, and Inovation let you play Actions in your Buy phase, Fleet gives players extra turns, and you can't turn off Cathedral.
I'm kind of dissapointed that Border Guard uses both Lantern and Horn, meaning that there are only four kingdom cards that use Artifacts. I hope he uses them again in another expansion.
Don't count on it. He's already gone on record saying that he'd remove them from Renaissance if he had to do it all over.
Where was this? It seems odd to already have such strong regrets about a set that is just hitting shelves and that essentially no one has played with yet.
I messed up, thinking that Donald X. had already said this in public and also for not providing context. It's not that Artifacts are bad. It's that sets are simpler when they have fewer mechanics and good Artifacts are hard to make, such that only four cards ended up using them. So some other mechanic might have been better from that standpoint. Possibly the Secret History will go into Artifact design a little, I don't know. Anyway, sorry for being alarmist. And apologies to Donald X. for speaking for him.
For what it's worth, I'm personally very glad that Renaissance has Artifacts. They might be my favorite mechanic in the set; a cool new type of player interaction.