Special potions?

[Lucian]

can there be found others than the permanent resist magic potion in malavons dome? Ive heard something about a potion of constitution that could appear in the vale of shadows

There is a permanent stat boost potion and yes, I'm pretty sure it's somewhere in Vale of Shadows. However, it's somewhat random. In different games I've found potions to boost different stats. And sometimes I've not found such a potion at all. I've been through the Vale four times with different parties and found such potions only twice.

My vague recollection is that it's in Kresslack's sarcophagus, if anywhere, but that's little more than a guess.

[Erekose]

Those potions do exist and in successive games they appear where the old antimagic potions where in the previous one. But a note of caution, they should always be identified before drinking because they often lift a statistic at the expense of another. Cheers