Mirran Mettle (Foil) (MBS) from Mirrodin Besieged, available at 401 Games Canada.

• Rarity: Common
• Finish: Foil
• Artist: Karl Kopinski
• Card Text:
  Target creature gets +2/+2 until end of turn.
  Metalcraft — That creature gets +4/+4 until end of turn instead if you control three or more artifacts.