Scan
"If we had a reliable way to get a handle on just how powerful you are, we could see if your power wanes when you summon your minions." Lucy explained.
"Yeah, but as of right now I don't even think an enhanced status plate will show my stats." Joshua said.
"I honestly doubt that it would as well." Lucy added. "What we need is a scan spell and a mirror. If you were to cast it upon yourself while looking in a mirror you should be able to see your stats."
"Why didn't you suggest that before?" Joshua asked. "We planned a whole trip to get a new status plate and everything! This was an option all along?"
"Well, maybe." Lucy said. "I have no idea if it will actually work, but it is worth a try. There just so happens to be a mirror in his cabin, see on the wall there. Walk up to it and say by my eyes reveal, all secrets hidden. Scan."