While we can expect these prices to drop a lot over time, its still good to watch them
Exalted Flamer of TzeentchExalted Flamer of Tzeentch gives up some more spell slinging reinforcement by letting us return a random instant or sorcery to our hand at our upkeep while also letting us deal one damage to each opponent when we cast an instant or sorcery
Boros also benefits from Lava Coil better than any other Guild out there
Not only is "A Whole New World" considered one of the most useful cards for gameplay, but it'll also only be available for attendees of the World Championships, as well as those competing
They copy themselves for each spell cast before it, so it's possible to cast enough spells to burn all your opponents with Grapeshot, or mill them all with Brain Freeze if you're able to cast a ton of spells in one turn (made easier with the Hullbreaker Horror combo)
5) Koraidon I honestly struggled with the number 5 slot on this list because there are so many cards that couldve taken the spot that I eventually gave to Koraidon [Surging Sparks]