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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.
I guess he means adding random tests.
Such as this :D
Ranks can't be changed!
Improved how?
I guess I did this in the worst possible way. xD
Btw, the tests for this Kata could be improved if it's possible.