Combo-control decks are great for players who enjoy the controlling strategy but dont want to spend their evenings tucking Teferi 50 times, or for players who like the idea of combo decks but dont care for the all-or-nothing playstyle that engines can result in
At the time of writing, the cards arent as expensive as you may be expecting - at least until you get to the Mystical Archive
An instant speed kill spell is mighty, and the treasure helps mitigate the cost, so at first it's hard to see why this might be
2 Blood Moon Many decks in Modern will be concerned when this hits the battlefield, and that includes Affinity
Still, some version of this effect could be a cool enabler, and I would love to see this as a combo piece in a Laboratory Maniac deck
Youll rarely want to play this for simple value but instead as an enabler for something like an elves deck that will generate massive amounts of mana and small creatures