I’ve never seen anybody try to Curse a dragon or balrog, but I don’t see why
they should be immune. They can be killed by challenge or assassination,
why not by Curses?
In a message dated 1/17/01 7:16:44 PM Eastern Standard Time,
devereux@lineone.net writes:
NPC’s cannot be cursed, just as they cannot be doubled or have artifacts
transferred to them. I tried cursing a Dragon years ago and there was not a
character for an allowable target (then GSI confirmed that NPC’s cannot be
curse targets after my attempt).