"Now... I'm motivated!"
Devil Trigger is one of Vergil's Hyper Combos. It is a special technique from Devil May Cry that is possessed by demons and half-demons, which allows them to release their full power.
While transformed, Vergil gains a strength boost, speed boost, and gradually regains red health. His attacks and assists also become enhanced, and he is able to perform either an air dash or a double jump. Unlike Dante, Vergil does not gain any new special moves, but he can use his Level 3 Hyper Combo Dark Angel, but using it ends his Devil Trigger prematurely.