[Nirgon]

http://www.tski.co.jp/baldio/patch/20000512.html

Though we do not have a problem with players choosing to hunt guards, the newbie guards themselves, specifically the ones at the gates of cities and in the vicinity of newbie zones, need to remain alive under most circumstances. To that end, we have buffed up these newbie-protecting guards, made them immune to magic, and given them some pretty good healing properties, in order to make them less attractive to people hunting them.

Note: this did effect all guards in wars woods and field of bone. Easy to verify this, compare the humongous hp values of the guards -- they should all be magic immune.