Since Kain considers his legs to be the absolute most important thing ever, he's going to gradually lose the proper use of them! What's a dragoon without the use of his legs, after all? On the first day of the event, he'll find his power is completely gone, which will mean he's unable to jump. Over the following days, his legs will get increasingly difficult to move, so he'll be hobbling a lot to get around, and end up essentially paralyzed for the later part of the event. He may need to get dragged somewhere safe to stay at some point!