Necro with a buy you can gain whenever you want is the easiest desing, and probably a good card. It's kind of like Duchess.
It's kind of a different card though. I really wanted to make something like a Duchess that actually makes your deck bad, but makes you ask yourself how much you are willing to damage your deck to get a little VP. The problem was that without vanilla bonuses 1 VP seemed too weak and 2 VP seemed too strong. And nobody likes 1.5VP