Top decker
From DominionStrategy Wiki
A top decker is a card which causes a card (sometimes itself, sometimes a different card) to be placed on top of the deck rather than in the discard pile.
Top deckers come in two general types: "on gain" and "from play." In addition, Scavenger allows you to put a card from your discard pile on top of your deck.
On gain
These cards allow you to place a gained card on top of your deck, rather than in your discard pile.
- Bureaucrat
- Bag of Gold
- Watchtower
- Tournament
- Fool's Gold
- Nomad Camp
- Armory
- Treasure Map
- Royal Seal
- Develop
- Beggar
- Graverobber
From play
These cards allow you to place one of the cards which you have in play on top of your deck (to be drawn in the next hand in most cases) rather than being discarded.