Winter Wonderland - 1

Strategy
Note: Don't use the Rage Chili on the first wave. Use it for Bomb at the second wave if the birds' healths are over 65%, otherwise, use it for Matilda and for The Blues at the third wave if the birds' healths are over 65%, otherwise, use it for Matilda.

Choose Matilda in Druid and Bomb in Cannoneer and The Blues in Rogues. In every wave, attack every turn with The Blues and Bomb, then, heal with Matilda if the birds' health is not full, otherwise, attack with her. Repeat this over and over until you win or lose.