Lethe Lake - Oversized Planechase Card (OHOP) from Planechase Planes, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Chris J. Anderson
• Card Text:
  At the beginning of your upkeep, put the top ten cards of your library into your graveyard.
  Whenever you roll Chaos, target player puts the top ten cards of his or her library into his or her graveyard.