Favored Enemy available to non-rangers?

[Calybos1]

Is there a way for a non-ranger to gain access to the Favored Enemy ability? And no, I don't mean by taking levels in ranger or semi-ranger classes... I mean somebody like a barbarian or druid.

[Artoo]

Variant Multiclassing from Pathfinder Unchained will give you a single favored enemy at level 7.

I'm not aware of any other ways.

[shroudb]

dedicated adversary feat from dirty tactics toolbox

Quote:

Prerequisite: No levels in a class that has the favored

enemy class feature.
Benefit: When you select this feat, choose a specific
kind of creature, such as wolf, frost giant, goblin, or babau
demon. You gain the ranger’s favored enemy class ability
against this particular type of creature with a bonus of +2.
This feat does not grant the favored enemy class feature for
the purposes of prerequisites. If you later gain the favored
enemy class feature, you can replace this feat with a feat
for which you qualify and whose prerequisites include the
favored enemy class feature.
Special: You can gain this feat multiple times. Its effects
do not stack. Each time you take the feat, it applies to a
different creature.

(p.s. stupidly good with martial flexibility)