The first 3 are really interesting. They make me want to know more about your character. I especially like the shutter shades one, because it draws you in and makes you want to know more about how they work, why he has migraines, etc.

I have a suggestion for one though: "I heard he made a deal with Tiamat, giving up his limbs to gain secret knowledge." I like the idea of people thinking the limbs getting blown off wasn't an accident, but was a deliberate trade. You can imagine how that kind of rumour would spread, especially among people who don't trust artificers because they're scared of "technology".