Screaming Swarm (VOW) from Innistrad: Crimson Vow, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Irina Nordsol
• Card Text:
  Flying
  Whenever you attack with one or more creatures, target player mills that many cards. (To mill a card, a player puts the top card of their library into their graveyard.)
  2U: Put Screaming Swarm from your graveyard into your library second from the top.