Thrummingbird (NCC) from New Capenna Commander, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Efrem Palacios
• Card Text:
  Flying
  Whenever Thrummingbird deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)