Very neat. I'm enjoying the possibilities you've created in this world!
As a fighter most of my proficiencies involve hitting things or carrying heavy things, but I like the idea of character growth over time. Perhaps he could study or otherwise learn some additional tools?
I think Almthu is just fascinated at knowing any magic, and has been itching to summon a "pet", so he would probably go for the basic recipe for now. But as he becomes more skilled, he may wish to try something more elaborate if it fits in with the story and idea of character growth.