The Aether Flues - Oversized Planechase Card (OHOP) from Planechase Planes, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Jason A. Engle
• Card Text:
  When you planeswalk to The Aether Flues or at the beginning of your upkeep, you may sacrifice a creature. If you do, reveal cards from the top of your library until you reveal a creature card, put that card onto the battlefield, then shuffle all other cards revealed this way into your library.
  Whenever you roll Chaos, you may put a creature card from your hand onto the battlefield.