Three Sigils I've used all got Clubs. So I made the entire deck into Clubs, unlocking the Onyx Agate Card in the process. My run was very versatile, since 95% of cards were clubs in around ante 11, and many kings and jacks, which allowed for the opportunity to play Flushes, Five of a Kind, Flush Houses, and Flush Fives. There is also an invisible Joker who copied my Yorick, saving my run. This was a very fun and cool run, and I recommend you try it.