A couple of years ago I placed a large Artscow order and by the time the order arrived I had forgotten exactly which games I had ordered. to make a long story short I put a deck of cards in the wrong box and only just recently found them. The back of the decks read "Delve" (there is an encounter and a Treasure deck) and 8 heroes.
Most of the cards refer to hitting on a '6' and this does not appear to be Delve: The Card Game. It also does not seem to line up with the other three BGG entries for "Delve". Does anybody know where the rules for this game might be and which BGG game it might be?