"She thinks it unwise to reveal that you have agreed to an alliance before you're called to face a real Servant; the sham battle permits you to break from your duel before one of you must fall to the other." He tilts his head as though listening to a distant voice. "She is willing to give you a wound to force your retreat, but she prefers to confound her watchers as Dionysos did Agave--with a false enemy to tear apart."