Scourge of the Aerie
Defeat Wendy within eight and a half minutes.

This battle occurs when you return to the Aerie in the second part of the game. Skip all cutscenes, don't worry if you miss this trophy in your first playthrough, it will be much easier to obtain in New Game+

Use your dark lance to damage the eye when its not shielded. Occasionally shades will be summoned, you dont need to kill them, but they may get in the way otherwise. Once the health bar has been depleted enough, you will be treated with an energy beam. Quickly run to the highest bridge and attack the eye again from behind. After enough hits Wendy will be hovering on the platform by the Aerie entrance, make your way down there and attack the eye again until Wendy is defeated. If you managed it within the time limit, the trophy will unlock.