Dragonrage (FRF) from Fate Reforged, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Tomasz Jedruszek
• Card Text:
  Add R to your mana pool for each attacking creature you control. Until end of turn, attacking creatures you control gain "R: This creature gets +1/+0 until end of turn."