I tried to recieve Fearless Black perm from grinding them but I failed. I spent over 100,000 carats on enigma boxes and only received the following; Sanshou (7 day), Hawkhunter (7 day) lesser enchantments fair,enchantments,nickname changer,lucky keys,hell keys,normal keys,3 silver british,silver mystery box and a 1000 carat coupon.