Quote Originally Posted by valho View Post
There is no special condition for the FATE the spawn, except I think Enmity of my enemy pre-requisite is Enemy of my enemy,
It is. Enemy of my Enemy is a battle between Sylphs and Imperials, and by clearing that FATE by killing Imperials, Enmity of my Enemy begins where the surviving Sylphs from the previous FATE turn and attack you instead.