You launch your self on the air and theres 3 things you can do shoot a slash in the the air or if you do a downward slash you make a fire line in front of your sword and the third one is if you smash your sword in the ground and make a explosion around you
People who have issues with nausea and motion sickness easy
When you go to hellfire sword there's a menu that pops up and say if you want the jump atts or normal att