Unfortunately , his abilities come to the attention of the Fire Nation .
He is coerced into developing a number of machines , redeeming himself after he breaks the arrangement and helps Aang repel the Fire Nation when they raid the temple .
Unfortunately , his abilities come to the attention of the Fire Nation and he is coerced into developing a number of machines , redeeming himself after he breaks the arrangement and helps Aang repel the Fire Nation when they raid the temple .