I came to look at the update for Galka Fang Sacks and saw that Napalms are listed as droppers. I find myself...skeptical. Why would a mob that has nothing to do with a beastman invasion drop the item that triggers it?
Every time I've gone farming for the Galka Fang Sack, I pop into the Napalm room and kill them on the off chance that a flame degen will drop. Plenty of kills, a few degens, but never a Garrison trigger item.