The pain that Seth had known seconds ago was gone, his anguish was gone, and his body was brimming with energy and though Seth was still standing within the throes of Alice's fire, he felt like he was in fresh calm water.
With Rose deciding to retreat, Seth decided that rather than waste his energy and time trying to burn her with his flame, it was more worthwhile for him to get himself free.
So with haste, he directed his dragon flames at his bindings and though the surrounding flames put up a bit of resistance, under Seth's flames, they shattered within seconds, and without hesitation, Seth kicked his feet and got out of Rose's garden of flames.