It can be gathered with a worker from the Excavation node at Lynch Farm Ruins just west of Heidel. But first, the Excavation node needs to be activated with 35 energy from a conversation topic with Zara Lynch.

Dropped by Giant Manes at a low rate, also dropped by the Violent Manes found there. Average about 30/hour of farming.

And you can get them from Saunil ( boss ).

The following monsters drop Savage Trace:

Small Mane 0-1

Agile Mane 0-1

Big Mane 0-1

Giant Mane 0-1

Giant Manehair 1-3

Saunil Fighter 0-1

Saunil Charger 0-1

Saunil Commander 1-3

Can be obtained as a byproduct of heating from Ain weapons found in Castle ruins (20-23) at a rate of 1-x depending on your processing level.

Can we get this in valencia now?

This is clearly dropped at desert Nagas as well.