It's the "I stabbed you but avoided all the important spots so you'll recover" thing I keep seeing in martial arts films, except this time idk why he'd bother to keep the assassin/spy alive. As an informant? A hostage?
I'm glad I wasn't the only one who laughed when he told her being impaled with a sword is no big deal. As if medicine was so advanced that they could stop her from bleeding out.... That scene had serious Monty Python and the Holy Grail "Tis but a scratch" vibes.