When you have three characters with a Dragoon Spirit, get into random battles and keep fighting until each of them is at a level 5 "SP" level. A Ying Yang symbol should appear to the far right of the battle menu. Highlight it and press [X]. It will turn your entire party into Dragoons and the person who uses the special will have a sort of ultimate wargod addition. When you attack, it goes through the entire attack without having to press any buttons. This works especially well in Boss battles. Note: This chance does not happen often -- save the special and do not waste it in a random battle.

Just get your maximum Dragoon Spirit up to full (it does not matter if it is below 5). You should see a new symbol. Highlight it and press [X].