Complex sentence: Easily led, Amygdala has been the pawn of a number of Batman villains but when properly medicated leads a peaceful act and is often let out into the community, where he is an ally of Nightwing and has worked as a warden.
Split into simpler sentences: Easily led, Amygdala has been the pawn of a number of Batman villains, but when properly medicated, he can be peaceful. He is often released into the community, where he has been an ally of Nightwing and has worked as a warden.