The Legions creatures with the provoke ability, including Feral Throwback, are tied together with a common visual cue. All the provoke creatures have a hook element in their art, whether it be a Krosan Vorine, Crested Craghorn, or a Lowland Tracker. The flavor is that the hooks allow the creatures to grapple others and draw them into combat with them.
Enjoy the rest of Throwback Week!