Just as it says on the tin. Went sailing and decided to kill a couple of beacons I found on the way while looking for ships. Swapped to my orc slayer spellbook after the water snakes were dead and found out that I did the same damage with my orc slayer book against the orcish crew as I did with my reptile slayer book. I don't have a repond slayer to test if they're vulnerable to it, but from what I could glance from the code they should be suceptible to repond already.