Please I have all other part.

You need to take the other lich body parts to the basement of the house between the inn and rebel thieves guild in the docks district. Don't initiate conversation until you're well prepared. You'll have a fairly nasty fight on your hands.

cool ! thank a lot ! and i will make cute work on it! i kill red ans shadow dragon, all other lich and group of mind flayer without move my sword. Trap is the best thing of the game !

I think you may be in for a surprise with this battle. I don't think traps will be as effective as in some other battles.

heh heh heh ! trap work very good !....just for his lich form....after that...OUCH!
i don't understand ,he do something strenge who start the dead animation but my personnage is far of him and don't even loose energy !! What that ! and how to counter that ?
by the way , before he do this he alway try to attack me and i never loose energy
help me again . I you cannot, i will try try and WIN !!!.......maybe.......

There are a ton of strategies on the board for beating him. Many of them are very good, though no one has mentioned my favorite. I like beating up on the lich same as any other caster. When he makes his transformation, I beserk my main fighter (to counter the imprisonment) and pound away on him with the +1/+4 vs undead flame tongue. He'll spend all his time casting worthless imprison spells and will go down quickly. If you have a beserker in your party, you could toast the lich with traps and then beat the demi-lich with the beserker. You'll just have to be careful to keep the rest of the party out of site so that they don't find themselves in little bubbles far below the surface.

Do you think that the daystar sword and the Holy avenger is better than the flametonge+1 ?

The holy avenger is no good because of its limitation in use. The daystar would be good against the demi-lich.

hiya, could help me, where can find the other
three parts?

the rib is in the bridge district as for the others i am not sure