@Duh_TaleWorldsAny non-player hero that gets "kiled" in battle has a 10% chance to die iirc. It's not weighed for or against any particular clan.
Wouldn't maybe be better if heroes and lords would be killed in battle (status) when they would really be killed? Instead of killed they should be just wounded if they don't really die. Would save some confusion I think.
EDIT: Sorry I see that I responded to quite old post.