Inkmoth Nexus (MBS) from Mirrodin Besieged, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Jung Park
• Card Text:
  T: Add 1 to your mana pool.
  1: Inkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying and infect until end of turn. It's still a land. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)