This is a specific entry for the much rarer non-signed version of this deck. Cartamundi overproduced the Ravn Sol run of decks and there weren't enough tuck boxes for the overrun. Instead of trashing the decks Lorenzo Gaggiotti and Caroline Ravn tested a tuck with white foil on a deep yellow paper. There were 231 of the overruns, therefore the 231 sticker on the tuck. The signed, more common version can be found here: https://www.portfolio52.com/deck/7930/view