Dragonshift becomes available as you go to the Windia Plains as part of a monster sighting with Sonia and Kirika. It turns out that a griffin has been causing problems. Dragonshifting is possible by pressing L1 + R1 (I'd suggest not trying them both at the same time but instead doing L1 and then R1, as there is a later command that utilizes R1 and you might get that first). Things to note: Triangle does a fireball attack (great for felling fire-sensitive enemies with for a speed battle), circle does a rampage of claw attacks, X does a dash attack, and Dragoneer abilities are enhanced while doing this form. The bar above the health images for the party members is your Rage bar; while it is filled, you will be fine, but should it get low enough or your MP depletes while in this form, you will go berserk and attack friend and foe alike.