NPCs proc through Rune
 

[Sat Jan 02 22:13:54 2016] Your bedlam fades.
[Sat Jan 02 22:13:54 2016] You feel your skin combust.
[Sat Jan 02 22:13:54 2016] Grenn tries to pierce YOU, but YOUR magical skin absorbs the blow!

I assume the code only checks for one level of rune; in this case I had two up.