Kingdom: Familiar, Hunting Grounds, Knights, Catacombs, Death Cart, Trader, Black Market (contains Young Witch, Haggler, Doctor, Village), Candlestick Maker, Squire, Embargo, Duchess.
Double Embargo Doctor. Save up tons of Coin tokens with a Candlestick Maker. Play Village, Haggler, Black Market. Buy Doctor, and overpay buy 23. Trash 10 Catacombs (gaining Potion, Sir Martin, Black Market, Squire, Embargo, Trader, Candlestick Maker, 1 Ruin , 2 Death Carts [4 Ruins]). Trash 10 Squires, gaining 9 Knights and Familiar. Trash Sir Vander, gaining 1 Gold. Trash 2 Hunting Grounds, gaining Duchy, Duchess, and Estate. Gain a Copper off of Haggler. Finally, from Embargo gain a Curse, and reveal a Trader to get Silver instead of the second.
Total: Doctor, 10 Knights, Familiar, Death Cart, Trader, Black Market, Candlestick Maker, Squire, Embargo, Duchess, 5 Ruins, Estate, Duchy, Copper, Silver, Curse. 29 Cards.
Edit: Oh, and Potion and Gold. 31 Cards.