Achromic Essence

is one of the seven essences that players can collect in the world of TERA. It is used in Alchemy.

is found by harnessing a Node. Harnessing a node will give players between 3-5. can also be acquired by chance when harnessing other essence nodes.

can also be acquired by chance when harnessing a Node.



Source
This essence can be found in almost all areas of the world. It is not limited to a certain region like other essences.