Quests

From Devilfight 2 Help

Each day you can start up to 5 free quests, that is: You get 5 quests offered. If you reject one, you can take four more, etc.

While you're at a Quest, you cannot accept challenges or train your attributes. Each quest ends with a battle against an NPC.

With quests you can get experience points.

With a little luck and skill in fighting, you can find a soul shrine with up to 100 souls!