to build a wall between us (don't let them win)

When Oliver accepts R'as al Ghul's offer to become his heir, he thinks he can change the League from within, without losing himself. He is wrong. When Felicity tries to save Nyssa, she thinks she can get through to Oliver, too. She is so wrong. The brainwashing works. Oliver is gone. And al Sahim has been given an order. Olicity