Pentad Prism (2XM) from Double Masters, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: David Martin
• Card Text:
  Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.)
  Remove a charge counter from Pentad Prism: Add one mana of any color.