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Generally, it's challenging to play the first game because there aren't any overpowered cheat cards. Everything is balanced within the game itself. For example, in my first playthrough, the AI didn't have any combat magic, but in the second, it had a lot. It just took a lot of time to complete some episodes. What impressed me personally was Fireball on the 2nd stage – after just over 10 hours of gameplay, it achieved 1st place. I probably spent 45-50 hours of pure time on it.
....Fireball, how much time did you spend on everything?... you're a genius... I only had time to test and improve the dragon variant from 3-2-3 to 2 days....