Hyper Cast Off is a keyword introduced in CB09, currently exclusive to Kamen Rider Kabuto Rider Form. The keyword reads:
- Hyper Cast Off - (When Attacks) When your Life is 3 or less, this Spirit can change places with a refreshed "Kamen Rider Kabuto Hyper Form" from your Hand.
In-universe, usage of an item known as the Hyper Zector allows a rider to further evolve themselves past the Rider Form, to Hyper Form.