In Hero Generations Enemies can be various different Heroes you may come in contact with. When attacking enemies, you'll have a chance to attack, and they'll have a chance to attack. If you come up higher, doing more damage, you'll win the attack and do the allotted HP damage, which will take years off their lives. Often there are heroes which will die after you win a battle with them, and they'll drop a Grave Site which can then be plundered. If you're able to win a battle, with the Thief Unique Trait you can steal additional gold from them.