There’s nothing preventing Nachzehrers from swallowing noble house troops, but they may choose to save it for more dangerous opponents (i.e. you). Nachzehrers can’t retreat from the battlefield anymore once they have swallowed someone.
Thanks for the reply Rap. That makes sense, since it’s a one-shot ability, use it on high value targets only. So at one time, they could retreat? I kinda like the added desperation of saving your brother at all costs, lest he become a free lunch. I wonder what would happen if all your brothers were to be swallowed simultaneously, would the battle end in total defeat, game over thanks for playing? I’ll have to try that out sometime.
A wise general wins before the battle, while the ignorant general must fight to win - Zhuge Liang