His character has morphed and evolved and shifted and changed over the years, and the one constant is typically that he tinkers on stuff
Additionally, Black Star Promos are promotional cards that exist separately from an expansion and follow their own numbering system as a result
You can put it in a high mana value commander as a backup win condition, but it really isn't a good idea
Full disclosure up front: I built Eyevo, so read my take on it with that in mind
Costing just three ink to play, it seems that Gustav The Giant, Terror of the Kingdom is the greatest deal in Lorcana history until you read the characters first ability - All Tied Up
So if you were intrigued by what Anya was doing, you were better off retrofitting Kaalia of the Vast for this niche