Chainer, Dementia Master

Legendary Creature - Human Minion 3/3, 3BB (5)
Nightmare creatures get +1/+1.
{B}{B}{B}, 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 other creature types.
When Chainer, Dementia Master leaves play, remove all Nightmares from the game.¹
Illus. Mark Zug

Crystal Keep Rulings Summaries

• Note - Also see Legendary, Rule G12.9.
• Note - This card was of creature type "Legend" until Oracle 2004/10/01, when it became "Minion". Then with Oracle 2007/10/01 it became "Human Minion".

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Torment (Rare)