The answers to the sphinx riddles I got were ice, Anephas and Kerah. I think the first one varies because of the walkthroughs I've seen.

Think i have a big prob.
The Squinx doesn't talk to me, but this seems to be
necessary to get into the temple. (Don't no why, maybe i shot an arrow towards it)
I tried "charm" but doesn't help.
Killing Myst Squinx is a very heavy job.
Savegame without an possible attack is rather old.
Any help ?

Recommend you go ahead and kill him now. I got the first riddle wrong (what has it got in its pocketses gollum gollum - guess I am no Bilbo Baggins), so he started to attack. A few fire and meteorstorm spells later I had a bundle of experience that advanced most of my characters. There are no kmown penalties for killing the beast.

Yeah, i did it. A hard job but worth 320000 Exp points.

Mine were death, Anacephus and Kerah.

Mine was death, kerah, anephas, but I killed him afterwards

Erad

As far as I know you don't need to do anything with the sphinx (squinxes are those cute monsters in chests) to be able to enter the temple. Using the staff of death should do.