This guide shows you one or more of the best and most efficient routes to farm Mote of Life in World of Warcraft Classic and is exactly what you need if you want to gather materials yourself instead of spending your gold on it on the auction house. If Mote of Life is not what you are looking for, you may take a look at all available farming guides.
Farming Motes of Life in Zangarmarsh
If you don’t want to farm life particles with a group in dungeons (talking about the Underbog here), then the Zangarmarshes and the giants that cavort along the southwestern mountain range are the only good options.
If the spot above is too crowded, try this one instead:
Farming Motes of Life in Terokkar Forest
The NPCs you are looking for here are called Root Walkers (Walking Trees!).
Farming Motes of Life as an Engineer – Zangarmarsh
The Zapthrottle Mote Extractor gives you the ability to farm Motes of Life from Gas Clouds all over the area.
For suggestions, improvement proposals or in case of finding a bug you are
welcome to contact me on my Goldgoblin Discord. Thanks a lot!