Jack_of_shadows, I'm taking as a basis something that was once an unpleasant feature in Heroes 4. The hero enters the movement range of a creature, which is 6 squares. If the hero is stuck in the field and the player is forced to skip a day, then the creature approaches him, using the animation from the battle to move and attack (1 time), and at the end of that day, the player has a battle with the unit that attacked him. Creatures that chase the enemy never run away or join.