We leave the real & balanced cards to Master Donald... these cards we just made for fun & giggles! We drew them on cardboard and to play with them, assigned a real card that was sort of like-looking to be that card. Translations from German below. (We own 4 extensions, sorry if a name or such of an existing card is repeated.)
Tax CollectorTake 1 card each (random and unseen) from the hand of all
other players to your own hand.
+1 Action
Cost: 5 - Action - Attack
GoldmineTake 1 Gold to your hand and gain 1 Gold.
Everyone else gets 1 Gold to their deck.
Cost: 5 - Action
FirestormEvery other player trashes 2 of their hand cards.
They draw 1 card from their deck.
Cost: 4 - Action - Attack
RewardAll other players together decide on 2 cards to give to you from the stock
(of cost 3 or higher each, but no Victory cards). You put them to your hand.
Cost: 4 - Action
Good Fairy+ 2 Cards
+ 1 Action
The other player who first shouts "Good Fairy" after this card is played
gains 1 Gold. You gain 1 Gold. (Whenever someone shouts Good Fairy
when none is played, they gain a Curse.)
Cost: 4 - Action
Word of advice: Good Fairy and Reward made us laugh a lot. Reward, because it can be used for something that doesn't help the other person, and also because it initiates a discussion among the other players. I also wanted to add a touch of cooperative or helpful play as one of us sometimes gets into fights. Good Fairy on the other hand is just generally funny (and sometimes requires an extra round or decision if both shout at the same time). One reason for introducing Good Fairy is to punish the absent-minded or those who do something else when it's not their turn!
Caveat: Try not to use Goldmine and Good Fairy in the same game... the Gold stock will be empty soon! Though that too caused giggles...