you need to do the main quest until you meet viec after the 7 trails he tells you the
plans to kill dgoth ur and makes you go and kill ash vapiers then he tells you about
sunder and kneening you get them go back to him and then he gives you the glove to make
sure you dont take the mortal wound then the end of the mainquest awaits you

the right one will be a gift to have them both you would need to kill vivec and take em,
although very dificult to accomplish.

These are the weapons you need to beat the game. The tools of Kagrenac. Here is where to
find them.

Keening- In Odrosal. Find the Ash Vampire, ask him about the Keening and Dagoth Ur's
offer. It has nothing to do with the story, but its nice to know. He will attack you after
awhile. Kill him for a special Amulet and a key. Use the key to open a ladder leading you
to the Legendary Keening. It will be sticking in the ground.

Sunder- In Veynulal, kill the Ash Vampire for it and a special amulet.

Both these weapons require the Wraithguard in order to hold. If they are used without the
Wraithguard(s), you will recieve mortal wounds of 100 HP every few seconds.