SpiralJacobs: Apparently it unlocks in the prologue, but it did not do so for me. Any idea how to unlock this ability?
FlashXAron: I think I got it where this ballista is, you have to go to the door and find a white dead body ... there it was suddenly unlocked for me.
Ah, okay, I did get this one. There's a lot of confusion around the abilities and how to get them. Some had tapped Assassin and Backstabber as two separate abilities. I also do not have intimidate yet.