This is not to be found on Olweg in WW-CoV. Just checked @ 2021-02-15.
At the top of https://everquest.allakhazam.com/db/npc.html?id=56404 you'll see a listing of items that are a limited supply on that merchant. Once bought out, they will no longer list until the zone is either reset or a server restart.
I whent farming Ice of velious and I found a lot of these herbs instead.. cider goblins, Young goblins, fire goblins, inferno goblin, young goblin shaman, fire goblin wizard, and fire goblin shaman drop this the most like its candy I got 8 from a huge pull
Game-Wide drop. I've had it drop off lvl 1-10 mobs and up to lvl 100 mobs. Don't spam the drop list with every mob in EQ. Can't Alla just add a game-wide drop note?
It's probably just a bottle, http://lucy.allakhazam.com/item.html?id=16598 as said, since the rest of the list is as said exactly. Although it doesn't say what to combine it in, but probably a brew barrel. It's lore is similar to Interplanar Brain Blaster.