Master Biomancer (CM2) from Commander Anthology Volume II, available at 401 Games Canada.

• Rarity: Mythic Rare
• Finish: Normal
• Artist: Willian Murai
• Card Text:
  Each other creature you control enters the battlefield with a number of additional +1/+1 counters on it equal to Master Biomancer's power and as a Mutant in addition to its other types.