Triskelavus (CMD) from Commander 2011, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Mark Zug
• Card Text:
  Flying
  Triskelavus enters the battlefield with three +1/+1 counters on it.
  1, Remove a +1/+1 counter from Triskelavus: Put a 1/1 colorless Triskelavite artifact creature token with flying onto the battlefield. It has "Sacrifice this creature: This creature deals 1 damage to target creature or player."