This opposing list is entirely blue-black with no red or green spells, so Flashfreeze cannot counter anything here and must stay in the sideboard; I've corrected for that and left it out. Qarsi Revenant comes in instead as a resilient flying deathtouch/lifelink threat that trades well with Kaito, Bane of Nightmares and Spyglass Siren while gaining life against their Dream Beavers drain plan. We trim Winternight Stories since this matchup is more about efficient threats and removal than raw card advantage, both players already have plenty of card selection. No Flashfreeze copies are boarded in given the color mismatch.