Here is the successor, aka re-implementation, aka expansion to Silver. In fact, Silver Bullet can be played independently of Silver, but you can also mix the two decks together. The rules of both games are basically the same, except for the card effects. Bézier Games has really created an interesting way of creating a series of games that all work the same, but still create a new level of interest.
In this unboxing video you can see what comes in the box.