Morrigan, of Death and Night

All Nightmares get +1/+1.

{b}{b}{b}, 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 Morrigan, of death and Night leaves the battlefield, exile all Nightmares.

“They appreciate my handiwork. I hear their joy in every scream.” —The Morrigan