Huh, lots of stuff going on in this episode. We finally get the titular seventh spellblade... Funnily enough, Bungou Stray Dogs season 5 also showcases the ability to cut through space-time that kinda makes the seventh spellblade look quaint.
Oliver's motivations are revealed with a little bit of his mother's (?!) backstory from seven (?!) years ago, but it seems like there is more to tell. Hopefully they also get around to explaining why there is a cult.
Looks like Oliver didn't need the advice that Richard Andrews gave him last episode.