This year's 2018 BBM Icons box set is titled Fanfare, and what that exactly means is a bit up for debate. My belief is it focuses on players who broke into professional baseball with great expectations, especially ones who were stars at the Koshien high school baseball tournament.
Each box comes with one 36-card base set, plus one special card. Retail price is 4000 yen, and only 3500 sets were produced.
And my numbers add up - that's exactly 3500 special cards. Odds are you'll pull a gold facsimile signature card, followed by the holofoil signature, actual signature, and then die cuts. However, each autograph is more limited than any other card, with a few exceptions with the holofoil die cut parallel (six players have autograph cards #/30, the rest are less).