The Historic version in particular suffers against these spells: Scurry Oaks combo has to wait a turn to win with attacking squirrel tokens, and the nature of clicking through triggers on Arenas clock means they will usually settle for their infinite combo only gaining twenty or thirty life before their turn times out
This definitely has a Throne of Eldraine sort of vibe, being very detailed in the artistry
You can cast this after a Deadly Cover-Up to put a body into play and set up your next couple of draws
It may have lost some of its luster, but Dark Confidant still shines brighter than the majority of black cards printed today
Try playing around with the pre-constructed decks first to get an idea of how Magic works, and then dig into some boosters and figure out ways you could either enhance those decks with alternate additions, or build your own deck entirely
Still, the fact it even happened at a high-profile show says everything