Gustcloak Cavalier (TSP) from Time Spiral, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Stuart Griffin
• Card Text:
  Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)
  Whenever Gustcloak Cavalier attacks, you may tap target creature.
  Whenever Gustcloak Cavalier becomes blocked, you may untap Gustcloak Cavalier and remove it from combat.