Let's search for (otag:mill-opponent or otag:mill-self or otag:mill) commander:sultai legal:edh order:edhrec , and find 900 relevant cards
You could ask: Are you going to attack me this turn? Do you have a counterspell in your hand? Are you able to win the game this turn? If I were to ask you if you concede the game, would your answer to that question be the same as the answer to this question? Spark Fiend is hilarious because its not entirely clear what the card does, why it does it, or how it does it
You could lean into his post vampire role in several ways
Players can win back their entry fee and more by doing well, while also earning Play Points, a non-tradable resource that can also be used for entering events
This card isn't bad at all, but the collector in me certainly wonders what the Full Art version of this will look like
Destroy it at the beginning of the next end step