Ichor Rats (SOM) from Scars of Mirrodin, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Matt Stewart
• Card Text:
  Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
  When Ichor Rats enters the battlefield, each player gets a poison counter.