Rare level X opponent (X=1, 2, 3, 4, 5 or 6)
Perhaps 0.1-0.3% chance of getting a rare opponent.
If you grind after money or a rare card its would be fun with a change from the pattern now and then.
The basic idee is what I like, it doesn't have the specific AI bonuses or human rewards.
lvl 1
AI bonus: 15 extra HP
Human Reward: Random non rare card
lvl 2
AI bonus: 30 extra HP
Human Reward: Random non rare card
lvl 3
AI bonus: 45 extra HP
Human Reward: Random non rare card
lvl 4
AI bonus: 100 extra HP
Human Reward: Random non rare card
lvl 5
AI bonus: Fixed deck with 15% uppgraded cards.
Human Reward: 1500 gold
lvl 6
AI bonus: Something really nasty
Human Reward: Fixed non coloured card that you only can get from winning this fight.
