Already a customer? Click here to login. Your ninja must have a ninja works ID - go to: https://worldninjaleague.org/athleteid/ And each season you must redo your waiver: https://waiver.smartwaiver.com/w/vg3cvc7tcajbhmsy3m5atm/web/ We're sorry but this event has been reserved. Please review our calendar for another available date and time. Thank you.