I'm a DM for a dnd 5e homebrew campaign and I'm thinking about giving my players some feats as a reward from a country they're helping. Basically a few of the high-level characters will show the characters a trick or two. I have a few ideas for what to give them, but I have an artificer (artillerist) and I'm trying to think about what options would make sense to present, and that he'd actually want.