Last but not least, we'll further explore the six distinct outcomes of the cards and offer some ideas how you might interpret them.
The heroic success is an extremely rare card. Most decks only offer a 1% chance of drawing this card. If your group gets this card during battle, feel free to grant them a very lucky hit, leading to instant victory. If this card shows up whilst looting treasure, giving them a powerful new item would be appropriate.
The great success is a more rare variant of the normal success. The higher the difficulty of a deck, the harder it becomes to draw this card. In battles, you can count these as especially effective hits.
One of the two base cards, which make up most of the decks. The action your player tries to do is successful. There really isn't much more to say about this.
One of the two base cards, which make up most of the decks. Whatever your player is trying to do, it fails. If it is an attack, this might simply mean that the attack misses. If it is a defensive move the player might take a light hit.
Just like the failure, but with harsher consequences. After a great failure during an attack, the player character might stumble or loose their weapon. Or they might have to take a counter strike. If they greatly fail to do a defensive maneuver, they might get seriously hurt.
The critical failure is the worst card in the game, but just like the heroic success, it is extremely rare (only 1% of the time, in most decks). Will an expensive weapon break in the midst of battle? Will the player accidentally hit an ally instead of the enemy? Or will this misstep even be their last one ever? In the end, you alone decide, what toll this card will take.
Have fun, game master!