If you spend a considerable amount of time grinding FGs and are like me, sometimes you start to wish to yourself that they were less ridiculously powerful - being able to sometimes draw 4-5 cards a turn without flinching while you're getting 1-2. But hey, hard work, big rewards, life goes on. Don't like it? Go play AI3/Top50...
...still, I think it would be fun to have a "Be a False God" mode, maybe as a quest reward, or unlocked after your first game against/victory against/5-losses-in-a-row-against a false god. Automatically have all cards in your deck doubled for the duration of the game, 200HP, double draw, triple mark - the works. However, winning wouldn't let you spin for cards, and you'd gain half (or no?) electrum from winning. It could even make a creative PVP mode.
I think it would be simple enough to implement, the rewards wouldn't be anything major (or anything at all if so decided), and it would just be a way to relax and have some fun, even the odds against false gods, or have some crazy pvp games.