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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Test cases for JavaScript aren't following instructions given. Exp given for battles is ( 20 * diff * diff ) however leads to errors in testing. By the time Warrior() is level 3, fights level 9, gains 720 exp, ends up as level 11, fails test because next fight is level 14 and test says the fight is supposed to be a defeat.