9. Chapel. Start with a hand of 3 NV 2 Mine, Put 2 Mine onto the NV mat, pick them up, then play them. You just Chapeled 0 cards.
You're on the right track, having solved the hardest part of the puzzle, but there's one problem: If you'd started with 5 cards and played a Chapel to trash 0, you'd be left with four cards in hand. With your solution, you're left with 0 cards in hand, so there's still a discrepancy there. You have everything right about how the Native Villages and Mines are played, however.
So have 4 cards on the NV mat to start?
Then it still wouldn't be the same as playing Chapel, because Chapel won't have removed those 4 cards off the NV mat.