help... again

For the unknown skull, try looking in piles of bones in wyvern nests and the floor covered with bones in area 5 of the forest and hills (it's also a wyvern nest).
For fighting teostra, I've added a hint for fighting all the elder dragons, so check out the hint page for this game.
Normal death stench has 40 defence per peice and it's skills are: Sneak, -health and fencing. It is good armour but is hard to get and the skills are not that good. Good luck with the hunt!

I think I just found mine by looking through bones layin on the floor. I found one in a cave where some wayverns lived. I have always been a fan of the lance. So I would give it a try.

Death Stench is a good armor it has a fencing skill (Your weapon will not bounce out it will penetrate even to monster such as Gravios Fatalis etc) an expert skill that would give you 15% affinity high enough to deal critical hit although you can gem it out for the upgraded version reckless abandon +2 which gives 30% affinity quite high.... The disadvantage of deathstench is that it will lessen you health but then again you can choose uf you wanna gem it out to give away the expert upgrade or the health upgrade.. Unknown skull you can find it in every map with particular zones just like caves and othere spots that has bones on it just crawl on it