Frosmoth - SWSH007 - Pre-Release Promo from Sword & Shield Promos, available at 401 Games Canada.

• Rarity: Promo
• Finish: Holofoil
• Artist: kirisAki
• Card Text:
  Ability — Ice Dance
  As often as you like during your turn, you may attach a Water Energy card from your hand to 1 of your Benched Water Pokemon.
  [1W] Aurora Beam (30)