@sethmode: I checked this episode earlier, but unfortunately it's only a followup discussion. So the episode would have been before this one. I'll probably work my way backwards from that episode and eventually I'll find it and post it here, unless someone else still knows it.
I've never heard of this conversation so I just listened to the clip on YouTube. Ryu definitely isn't a wizard. Shooting energy doesn't automatically mean it's magic, by that logic Goku and Cyclops from X-Men are wizards too. I'd also add using magic doesn't automatically mean someone is a wizard.
He said he was looking for the full Bombcast episode. Had to be an episode at some point in late 2013 (or first week of 2014). Someone could read the Comments section for those Bombcasts and it should give away the episode.