Grindclock (M15) from Magic 2015, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Nils Hamm
• Card Text:
  T: Put a charge counter on Grindclock.
  T: Target player puts the top X cards of his or her library into his or her graveyard, where X is the number of charge counters on Grindclock.