Disaster Radius (ROE) from Rise of the Eldrazi, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: James Paick
• Card Text:
  As an additional cost to play Disaster Radius, reveal a creature card from your hand.
  Disaster Radius deals X damage to each creature your opponents control, where X is the revealed card's converted mana cost.