One of the new mechanics and gameplay components in the Prime edition of Spellfire are the "NPC" cards. The short term means - Non-Player Character. It's like intelligent bots; artificial intelligence integrated into the Spellfire card game. NPCs might help you attack the opponents; they might help you defend your realms. Sometimes players will pray, ask and wait for them to come, but sometimes these NPCs will be the pain in the ass, waiting for your mistakes. That will add the unexpectedness factor to the card game.
The Spellfire app controls most NPCs. The app might decide not only the type of the played NPCs but also their powers, actions, and decisions.