As we all know once u finish the 5 Rolls, and u happent to fail reatching the end Goal

                                                                   at both the Special board and the normal one u gaine a item in your black sprit's safe   

now once u have 5 of the Black Spirit's Special Dice Piece, combine them with 1 black gem fragment 

"u can buy it at the market palce".

use the prossecing window "Press L to open" and select simple alchemy as shown below.

u will get a random dice like this 

that is it and i wish every one Good Luck :D