-( This is a chapter-specific trophy related to: Chapter 2 )-
Once you've released all three storm clouds, scale the tower once more and you should briefly see the bone bird struck by lightning, being sent over the edge as you're climbing. Roll the ball back towards the tower's gate and run after it to be given a cinematic of your avian friend coming back for one final rush. Instead of running away, like expected, choose to run towards the foe.