Grown-up Snowball Fight is a special Battle card that is automatically placed in the center deck during the Santa Scramble event. A total of 4 copies are available per game, along with 4 copies of . Originally, these cards were added into the deck, giving the deck a total of 56 cards instead of the usual 48.. As of Version 1.31.4, they will instead replace two cards from each player's deck, keeping the deck at the usual 48 cards. Grown-up Snowball Fight is unique in that although it is listed as a Battle card, it is used only in snowball fights rather than battles.
- Confirmed by Rive on Discord.