Devilsaurs appear to be the first of the exotic pet families, although at the moment they can be tamed by any hunter.
Ferocity talent tree
Your devilsaur ferociously bites the enemy, causing damage, and boosts its own attack power by 5% for 12 seconds. This effect stacks 3 times.
25 Focus, Instant, Melee Range, 10 sec cooldown
WOOt BM hunter FTW