Quick battle.

Everyone who says things like "it's unfair," or "it's not heroic" conveniently forgets about other people. The main purpose of autobattle, even since the third installment of the series, is to save time when playing with other people. Good players always use autobattle against neutral creatures, only switching to manual battles when there are critical losses. This shows basic respect for other people's time. When you start a game with 4 players, and on the very first turn, someone takes three minutes to make their move, and then even engages in a manual battle, it's, to put it mildly, irritating to people who have other things to do in life besides playing.