http://dominion.isotropic.org/gamelog/201203/02/game-20120302-115526-5d31002d.htmlJust played a very interesting game. I don't think that my win was much other than luck, because I didn't actually think of this interaction, but just lucked into it. However, check out my turn 17:
— Epoch's turn 17 —
Epoch plays a Throne Room.
... and plays a Grand Market.
... ... drawing 1 card and getting +1 action, +1 buy, and +$2.
... and plays the Grand Market again.
... ... drawing 1 card and getting +1 action, +1 buy, and +$2.
Epoch plays a Conspirator.
... drawing 1 card and getting +1 action and +$2.
Epoch plays a Conspirator.
... drawing 1 card and getting +1 action and +$2.
Epoch plays an Embassy.
... drawing 5 cards.
... discarding 3 cards.
Epoch plays a Grand Market.
... drawing 1 card and getting +1 action, +1 buy, and +$2.
Epoch plays a Grand Market.
... drawing 1 card and getting +1 action, +1 buy, and +$2.
Epoch plays an Embassy.
... drawing 5 cards.
... discarding 3 cards.
Epoch plays 4 Silvers, a Potion, and a Royal Seal.
Epoch buys a Grand Market.
... putting the Grand Market on top of the deck.
Epoch buys a Throne Room.
... putting the Throne Room on top of the deck.
Epoch buys a Throne Room.
... putting the Throne Room on top of the deck.
Epoch buys a Conspirator.
... putting the Conspirator on top of the deck.
Epoch buys a Vineyard.
(Epoch draws: a Silver, a Grand Market, 2 Throne Rooms, and a Conspirator.)
Royal Seal enables me to turn my first, um, kiloturn into a near-guaranteed megaturn by setting up TR-TR-Grand Market-Conspirator. This leads to, on turn 18, $40 + potion and tons of buys = buy out the remaining 5 Provinces and a vineyard for the win.
Usually, it's hard enough to set up TR-trees that it's not necessarily worth the effort outside of a deck that's already drawing most of itself each turn. But Royal Seal, Throne Room, and +buy lets you snowball into bigger and bigger turns.
(NateY, my opponent, was a gentleman and a pleasure to play against, and we had a nice chat post-game.)