I'm not sure, I think a Checkhov's gun is supposed to come as a surprise, while here the acquisition of new skills is pretty explicit. Which is not to say there are no Chekhov's guns where you least expect them Hehe, the fun is in the details!
Very good, as usual. The one thing I'd like to point out is that the background star is a little too clear in Amer's eye in the first panel. And the transition from dream to waking is a little too... gloopy? I'm not sure what the right word is, around the edges.