Step 1: Idea.
first you need to come up with an idea for a card game. You could make a card game with figures or just cards, or make a whole game board. I don’t really care. But you need to come up with the building blocks that could someday become famous.
Here are some examples:
Subtracting health (Pokemon or Bakugan)
Three strikes your out (Redakai)
Majority (Instructables card game)
Be sure to chose a theme too. I chose a medieval card game with castles and dragons. Then after i chose the theme i chose a title Castle Quest was mine but you can come up with your own. Make sure the title portrays the game too.