Arcane Proxy is the card that piqued my interest the most in The Brothers’ War, the newest Magic set coming out in few days.
While the casting cost seems prohibitive at seven mana, this card has a new ability called prototype, which lets you discount its mana cost to 1UU by getting a 2/1 rather than a 4/3. You’ll be able to flashback an instant or sorcery that costs two or less, making this card similar to a Snapcaster Mage if you’re flashing back a one-drop, but better if you’re flashing back a two-mana card like Expressive Iteration.
We’ve already seen Izzet Murktide lists playing Snapcaster Mage, but it was never quite as good as the other threats. I’m curious to try Arcane Proxy out since its combo with Expressive Iteration might make it better than Snapcaster for UR Murktide.