The small package contains the "Fate Stones" (aka "Stones Of Fate"), two acrylic stones (black for the Fomori and amber for the Tribes).
During the game (either permanently or at the end of each round), players are able to keep track of the amount of locations occupied by the Fomori and by the Tribes respectively.
For this purpose, the stones are laid next to the Fame Point Track, indicating the respective amount (e.g. if Balor & Fomori occupy 17 locations, the black stone is put next to the number 17 of the Fame Point Track).