So I'm playing a Scrying Pool deck, and my opponent plays a Governor on his turn:
--- goshen's turn 16 ---
goshen plays a Governor.
... getting +1 action.
... drawing 3 cards.
... GendoIkari draws 1 card.
goshen plays a Governor.
... getting +1 action.
... goshen trashes a Gold.
... goshen gains a Province.
So my draw pile is almost empty, and I get an awesome idea...
... GendoIkari trashes a Potion.
... GendoIkari gains an Inn.
... ... shuffling 13 cards into the draw pile.
Ha! The Scrying Pool in my hand will now draw every action in my deck for the greatest turn ever! But then...
goshen plays a Fortune Teller.
... getting +$2.
... GendoIkari reveals a Festival, a Festival, a Festival, a Scrying Pool, a Festival, a Spice Merchant, a Fortune Teller, an Inn, a Scrying Pool, a Festival, a Festival, a Fortune Teller, a Scrying Pool, and a Province.
... GendoIkari puts the Province back onto the deck.
... GendoIkari discards 2 Fortune Tellers, 3 Scrying Pools, an Inn, a Spice Merchant, and 6 Festivals.
Noooo!!!!!!! And they say Fortune Teller is weak!
So it ended up not mattering at all, as I still Scrying Pool'd my way to the last 2 Provinces on the next turn.