User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-4911512-20130513185502/@comment-26074976-20130513192118

If there is a monster out for example Rathalos, play the horn and it will come into the same area as you. It only works for a few monsters. Rathalos it does, I think so for Lagiacrus maybe Jinouga/Zinogre. Not entirely sure.