As for mines, a boss have a skill that keeps growing each turn. Another boss I made up, it causes a stat problem, if your infected with it, it does 10x damage, other then that, its normal damage. And finally, a boss that conceals your status condition, you have to keep recovering, or you end up with poison, burn, and decay and you gotta cure from stun, asleep or paralyze, you have to figure out what you hit with or it will end up getting worst every turn if your not curing the characters.