i had skipped this one until today which made it more difficult as you typically only get 1 or 2 frozen auras per match. but it's fairly simple if you basically just spawn units on top of the Turkey so they are instantly frozen. If you don't get the frozen aura at the start it doesn't matter just kill the turkey ASAP. You can use this time to set up for when you get the frozen aura. My deck looked like this to 1 shot this challenge.

5 gold Skeleton Party (ritual of rime, this talent is the only one I'd bother with otherwise it's too expensive, costing basically 1 gold per frozen unit. but if you place them strategically in spots where they survive the entire game (behind towers) the turkey will drive over them 10 times. so if you put down 3 skeleton parties that is 15 skeletons x 10 times frozen = 150 frozen units already. GG)

2 gold -Chickens (any talent besides Crate) 9 x frozen

2 gold -Bats (any talent, poison is technically a bit worse because this is the only way the bats can damage turkey but I used poison and completed this quest 1 try) 6 x frozen

2 gold -Skeletons (the talent that spawns double the skeletons near tower) 5 x frozen

1 gold Bandits (Pick Lock for increased income) 2 x frozen 8 gold of you split them to get 2 chests. (GG)

1 gold Vultures (any talent) 2 x frozen

all of these units besides the Mages cannot possibly damage the turkey so it will last a very long time. only towers and the boss will do damage.