Nico Di Angelo Thingy
Call it a prompt, call it a headcanon, give it any pairing you want (though strangely enough Valdangelo might fit this really well… not saying the others won’t), have fun with it.
After the second giant war, Nico does some travelling (not immediately, he’d have got in trouble with Will, Jason and Hazel if he did that). He goes back to Venice to try and learn more about his mortal family and maybe feel closer to them. While he’s there he learns how to blow glass. (Who knows how that happened but it probably has to do with how beautiful that Murano glass there is, maybe he was looking for a present for Hazel?)
During his apprenticeship/ time of learning, he learns he can use black Hellfire like his dad. That kind of fire turns things into liquid which is rather handy for glassblowing which starts with liquid (or perhaps a bit between liquid and solid in) glass. Besides that he learns that his fire has a certain effect on the glass once it’s blown. Perhaps it makes the objects more sturdy, perhaps it gives a certain shine or color to the glass, who knows, other ideas are welcome as well.
This makes him so happy ‘cause by combining his mortal heritage and the powers he got from his dad he is finally able to create things instead of destroying them. Maybe he keeps it up once he returns to camp, he may even create a little forge (think it’s called a forge) in the Hades cabin.
This was partially inspired by this vid on youtube where a man makes a glass sword.