Sunforger (MM2) from Modern Masters 2015, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Darrell Riche
• Card Text:
  Equipped creature gets +4/+0.
  RW, Unattach Sunforger: Search your library for a red or white instant card with converted mana cost 4 or less and cast that card without paying its mana cost. Then Shuffle your library.
  Equip 3