Spoiler
.
.
.
.
.
.
.
.
.

I've heard a rumour you can save glacius instead of killing him (upstairs in Nalia's keep) 've tried dominating him (down boy) but it does not seem to llow me to talk to him

Any ideas

Yeah, actually.

Spoiler
.
.
.
.
.
.
.
.
.
.
.
.
.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Quote from Sorcerers place Walkthru

In the de'Arnise Hold, in the secret room where Glaicas is located,
you have to charm him to "normalcy". But there's a bug with the game:
a couple of seconds after you charm him, he turns blue for about 1
second, then turns green again. So, basically, your own charm spell
is interferring with the script that would lead to him talking to
you.

If you want to save him (and earn 22,550 xp), you have to time it
right so that when you charm him (he turns green) one of your attacks
will hit him (this must happen BEFORE he turns blue). He will turn
red again... pause the game and make sure you stop all your
characters! He will continue being hostile, but then the script will
kick in. He'll talk to you and give you the last part of the flail.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~

End of quote.

Does that help?

AHA! So THAT'S how it's done! This has kept me wondering for AGES!

Well i charmed him and just ran away never got the flail