So you can poison a few goblins drinking at the goblin camp by combining poison with their booze reservoir (the thing that looks like a toilet),
I've tried this with wyvern poison on a new playtrough, but it didn;t work.
It says 'combination failed', is this a bug? IT seems stupid that you can poison them with regular weapon poison, but not with more potent poison...

Alternatively, does anyone know a good place to source poison from? I;ve got heaps of it on my old playtrough, but can't for the life of me remember were I looted some.
I know the Zenth hide-out around Waukeen's Rest should have some, but I'm not that far yet on my new playtrough.