An interesting ability as far as Pathfinder abilities go. Makes tracking and hunting go beyond those who take all those levels in Ranger or Hunter to an extent.
In my experience with Mythic games, the thing that kills it is linearity; making builds focused around certain mythic abilities usually tend to make the games one-dimensional since most mythic abilities are just power boosts and extensions of existing abilities. Its just my opinion, but mythic abilities should be stand-alone utilities with requirements to obtain them, like this one.