Chainer, Dementia Master (TOR) from Torment, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Mark Zug
• Card Text:
  All Nightmares get +1/+1
  BBB, Pay 3 life: Put target creature card from a graveyard into play under your control. That creature is black and is a Nightmare in addition to its creature types.
  When Chainer, Demetia Master leaves play, remove all Nightmares from the game.