To do so one must have the appropriate level of Herbalism and simply act as though they were gathering from any other herb node. Similar to skinning the player requires a herbalism skill of at least five times the target mob's level, but unlike skinning herbalists can not skill up this way.
Herb skinnable creatures
Only some nature based giants and elementals (notable only elementals that resemble giants) can currently be herb skinned. The total is currently 22 and these appear in Zangarmarsh, Terrokar, Blade's Edge Mountains as well as a select few instances.
Some of the skinnable creatures include:
- Bog Lords in Zangarmarsh.
- Underbog Lurkers and Shamblers.
- Rotting Forest-Rager in Terrokar.
- Raven's Wood Stonebark in Blade's Edge.
- Warp Splinter in Botanica.
As you can currently only skin Outland mobs you can only obtain Outland (301+) level herbs from doing so including the valuable Fel Lotus. Herbs are not all you receive however, alongside them you will get a variety of vendor trash items and even motes of life.
For more information see:
Using the same mechanic: