Got some small changes based on some feedback from Hoth733 (check out their version of the cube here: https://cubecobra.com/cube/overview/16lo)

Abrade -> Fire Prophecy: Abrade doesn't really have the targets in this version of the cube. I want card selection to be a driving force for blue, but like giving red a small taste here. I also have my eye on Harvest Pyre if I decide 3 damage with a 2 drop is too fast.

Callous Dismissal -> Downsize: Having both Callous Dismissal and Unsubstantiate in blue was just too much. I really like Unsubstantiate as a temporary counter, so Callous Dismissal is the one on the chopping block. Downsize offers a defensive one-mana answer on the draw to survive to turn 2, can lead to profitable combat, and can act as a pseudo "sweeper" in blue later in the game. Excited to see how its overload plays out.

Also, Fiery Cannonade's on the block, it was really only ever in the cube as an analogue for another red sweeper in the original cube this was based on (since I actually have a copy of Fiery Cannonade). I want each color's big 3 mana payoff to play into the color's themes as much as possible, so I'm keeping an eye out for red 3 drops that reward going wide, whether that's a creature or a trumpet-blast effect.