Edgewalker (SCG) from Scourge, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Ben Thompson
• Card Text:
  Cleric spells you play cost WB less to play. This effect reduces only the amount of colored mana you pay. (For example, if you play a Cleric with mana cost 1W, it costs 1 to play.)