Nymphs , and the marks from PvP Events (weekly tournament, leagues) cannot be won in spins, they shall be more rare than other cards. It would be abusable, if these cards wouldn´t somehow appear in spins. That´s why these cards are replaced by the filler card "Relic". They only give you some coins and my have a small collector´s worth, but aren´t useful ingame.
P.S.
It also explains what the card text means with :"the remains of a valuable creature or artifact " - The remains of a nymph or a mark card after a game.
