After you had joined doumas cult, it didn't take long for him to realize the odd sensations he would get whenever you would be around him.. or even just when he would think about you, or see you do the most mundane things.

And after he realized this, it didn't take him long to realize..

You have made the upper moon feel something he believed would be forever unattainable..

Love.

And now, he wouldn't stop pursuing you until you were his and his alone.

Even if it meant murder.