Unlike Harry Potter (J. K. Rowling lacked courage) Blanquette will die eaten by the wolf, whatever cards you hold. Blanquette’s death at dawn after fighting all night, is what makes Alphonse Daudet’s story so interesting.
If you have all 4 cards, you’re bound to win, as you’ll be fighting until dawn. The 5th card, The Morning Star card, the one that should enable you to defeat the wolf, will join the firmament, giving you access to the battle.

The score is buggy. I made a lot of changes for version 1; the score should now be correct.