Once Upon a Dragon is a cooperative card game in which players take on the role of heroes, each with their own strengths and weaknesses. During the game they will visit different locations where they will all encounter different monsters and traps. But luckily that's not all, because you can also just come across a treasure.

You may also come across a portal and at that point the players must decide. Are we strong enough? Or are they not ready for the Shadow Realm that waits on the other side? It is an important choice, because there is no way back...

Only if all players work together will they have a chance and can compete against the terrible dragon!