King Form is Kamen Rider Blade's ultimate and most powerful form. Although, I've always thought that Jack Form looked cooler, myself.
It's good to see Bandai finally giving some love to Kamen Rider Blade. Sadly, this particular figure will indeed be yet another Tamashii Web Exclusive. Let's hope the import price won't be too painful.
He'll be released in Japan in December for Y 4,725 (approx $47.00)