Chainer, Dementia Master [Commander Masters]

Set: Commander Masters Type: Legendary Creature — Human Minion Rarity: Rare Cost: {3}{B}{B} All Nightmares get +1/+1.BBB, Pay 3 life: Put target creature card from a graveyard onto the battlefield under your control. That creature is black and is a Nightmare in addition to its other creature types.When Chainer, Dementia Master leaves the battlefield, exile all Nightmares.