Cloudhoof Kirin (SOK) from Saviors of Kamigawa, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Randy Gallegos
• Card Text:
  Flying
  Whenever you cast a Spirit or Arcane spell, you may have target player put the top X cards of his or her library into his or her graveyard, where X is that spell's converted mana cost.