Does anybody use the blank cards to make up their own kingdom cards? It's probably the game designer in me, but I keep having the urge to think up my own card ideas. I'd like to share one here, but I'm interested in cards that other people have made up and found to work well in their own home games.
One I've found to be very nice is one I've named Architect. It's a 3-cost card that does this: "+3 cards. +$1. Put 3 cards from your hand on top of your deck." I've gone back and forth over making it cost 3 or 4, and whether the monetary bonus should be +$1, +$2, or +$0, but those details are peripheral to the main function of the card.
The reason it's called Architect is that it lets you coordinate not just your current hand but a good chunk of the next one as well. There is no +action, so you probably want to push actions back on top of your deck, but if played with a village, you still have the freedom to try to plan whether an action sequence is played in the current hand or the next one. You can also use it to try to group together Treasure Maps, make sure Throne Rooms get paired up with an action, or give your Bishop the card you want to trash.
Two similar cards are Warehouse and Courtyard; interestingly, I made up this Architect card before I became familiar with Intrigue and Seaside, so I didn't derive my card from either of them. In any case, both Warehouse and Courtyard play very differently:
With Warehouse, the fact that you discard the three cards, rather than returning them to your deck, makes Warehouse a simpler affair -- just discard anything green, for example, any terminals you won't get to, etc.
Courtyard is more similar and yet, somehow, completely different. The "put one card back" lets you save an action card you wouldn't get to use, but you don't really get to set up your next turn, which is what my card is designed to do. I find I don't really much care about Courtyard in most games, but Architect seems to fit well in a variety of situations. The one drawback is that deciding what three cards to put back can be complicated, so it can slow the game down a bit when it comes up.
Thoughts? Has anybody else made up a card that plays well?