Young Lucius runs to a store of dummy hands and presents them to his mutilated, traumatized aunt in hopes of cheering her. Her smile speaks volumes.
The ending, where Young Lucius, who had been taught to hate the black Moors, takes pity on Aaron's infant son by freeing him from the cage, and presumably, the cycle of revenge and bloodthirst. He walks with the baby in his arms, departing the colosseum of bloodshed towards a sunrise just peeping over the horizon. The visuals and the gestures speak for themselves.