Acererak's Attack (don't know the name) killed the body and soul of the character (Acererak ate the soul) and no resurrection was possible.
It was a 10th level spell, though.
I'm guessing a Vile 9th level version is available, that allows a saving throw.
There was a way to use 10th level spells in the old 2nd Edition, from the Book of the Magister, but it was costly in the extreme (and effectively had to be done somewhere other than the Forgotten Realms.)
- You had to be 20th level, have 20 intelligence, and 18 wisdom.
- You had to have a 2nd wizard of 18th level, 18 intelligence, and 18 wisdom to serve as an anchor (An Eidolann of yourself would work, if it was high enough level. A Clone would work ... before it tried to kill you ...)
- The first casting of the spell (one time only thing) always failed, but you suffered all the penalties of attempting it.
- You lost 1 level, dropping to the lowest number of experience points needed to hold the next level down (a Greater Restoration would be needed here to reverse this. Or a Wish or Miracle.) Your backup wizard also lost 1 level.
- You and the backup wizard sustained 2 to 12 hit points of damage.
- You and the backup wizard lost 1 to 6 points of Constitution temporarily (regained at a slow rate given in Secrets of the Magister.)
- The casting of the spell attracted the direct attention of both Mystra and Azuth. If you cast the spell for altruistic reasons, no problem. If not, they killed you and the backup wizard both (no resurrection possible) and took the spell away for good measure.
So, I suppose if you engineered everything just right, you might be able to throw Acererak's Attack, on Oerth (assuming, of course, that you somehow convinced Acererak to teach the spell to you first!

)