Please report outages in the thread "messages/server outages", Thanks.
Achievable at...well.... you'll see Believe me, you will need more time, but it's achievable for genins and up... (I sticked to Naruto there)Yes, it stays after an Oro kill, because it's too much time to learn it again within one Oro Kill Cycle. Yet it is not "free".
Will the teacher of the Rasengan be the same as the show?