TheWoWDBIt appears that Filandras Mistcaller is bugged right now. Twice now I've seen people be able to interact with him directly following a server shutdown, but then he's no longer able to be spoken to again.
Rare
Pollous the Fetid
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Bugged. He's just staring at a wall. Had 4 people try to aggro him, but it won't work.
This rare is bugged atm on Emerald Dream
Details
This roster comes from the current game client's data files, so it is not a complete list of every NPC in the game - older world NPCs that are no longer in the modern client are absent.
Community notes from Wowhead · 29 comments
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Collectibles Pollous the Fetid Drops
- Fetid Waveling (battle pet): its in-game source line reads “Drop: Pollous the Fetid”.
Level and Map Tracking
The game data tunes Pollous the Fetid for levels 10 to 45, Legion content.