is it drop one time from every torment boss ?

i think i have get one from duriel?

You only get it once. It's a first time drop from your first torment boss. Otherwise, you can only get it from salvaging uber uniques.

Do you not get one per each tormented boss you kill? I was hoping you'd get a total of 4 from those and finishing the wolves rep.

Nah, it's only the one.

level an alt in helltides for extra sparks. what im doing is leveling a thorn minion necro, temper all those lvl +2 yellows with +thorn damage and spam helltides boss. watch her flop in one hit at lvl 3. juicy iron wolf rep