Jokulmorder (CSP) from Coldsnap, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Mark Zug
• Card Text:
  Trample
  Jokulmorder comes into play tapped.
  When Jokulmorder comes into play, sacrifice it unless you sacrifice five lands.
  Jokulmorder doesn't untap during your untap step.
  Whenever you play an Island, you may untap Jokulmorder.