Flux Channeler (Foil) (WAR) from War of the Spark, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Foil
• Artist: Heonhwa
• Card Text:
  Whenever you cast a noncreature spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)