User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-11537809-20130922145339/@comment-7584137-20130922174831

Kirin sub is only fought at HR100? I heard that Fatalis is unlocked at HR70 and Tigrex Rare at HR50. So if there is no monster causing the Vortex and it isn´t unlocked at a higher rank, Kirin sub is basically the final monster of this game. Not that surprising. A.Lagi was the final monster you had to unlock for MH3U after all.