Final fantasy 8 riddles

[Liberi_Fatali]

Zombie powder.

I'm a unit of life- Zombie status is a different state of life.
I pay half way- Using it causes the victime to become undead, half way between life and death
Find me from a fiend- Gerogero, who drops it, is a fiend
With a pirates say- I seem to remember him screaming in pain, "ARRRRRRRGH!" or something like that while giant noxious boogers exploded from his oozing body.

So Zombie Powder. I don't know, I'm really stumped on this one. You've succeeded in writing a frustratingly difficult riddle, Comet.