Board Thread:MHX General Discussion/@comment-25275196-20151127232142

Usually, an elder dragon is only repelled if not enough damage is done before the time is either up, or half up. During the gameplay with Osutogaroa, the timer hadn't even reached the ten minute mark. I can think of two possible answers:

1. Elder dragons now cannot be killed in a single quest, and if you deal the damage required to repel it once, it automatically flees. If this happens with other elder dragons remains to be seen.

2. Osutogaroa cannot be killed in this quest, no matter how hard you try. And Osutogaroa will return in the high rank quests as the "true" final boss, and be able to be killed then. 