They forcibly convert other species into emotionless cybermen, and that's pretty much what Cyber Conversion does
Plenty of other sets have had different factions that focus on aristocrat-style strategies
The game had a solid enough start with The First Chapter, but the subsequent sets in Rise of the Floodborn and Into the Inklands have created a healthy meta with plenty of viable decks
The Magic: The Baseballing drop was one that takes iconic Gatewatch characters and gives them a sports-themed makeover in baseball card-styled reprints
Use flicker effects to bring the engine in and out of play, to give multiple opponents boards full of -1/-1 counters and reuse its proliferate effect
There are a lot of combos you can pull off with this 4/4, with the added benefit of Menace being interchangeable with other enablers like Branching EvolutionBranching Evolution, so check out the Commander Spellbook entry to for deckbuilding inspiration