Post-match analysis.

The idea is that this unit is the most dangerous to attack, as it's not beneficial to target it, since the marksmen attack after it has already struck. So, after the attack from angels (10% chance) and knights, it gets weakened, and then it starts slowly chipping away at the copies, and the old stack of griffins will also attack them, only the third one will attack the angels and knights. If you don't attack it, there's a risk of losing morale in the Great Siege, after which, with the death of the pikemen, there's a high chance of a game-over. But as it is, it's reliable, and most importantly, you don't have to waste a shot on them. There are scenarios where you can sacrifice an angel and still guarantee a victory in the battle. If there was a haste ability, then attacking the angels and griffins wouldn't be necessary.