Abyssal Harvester [Foundations]

Cost: 1 B B T : Exile target creature card from a graveyard that was put there this turn. Create a token that's a copy of it, except it's a Nightmare in addition to its other types. Then exile all other Nightmare tokens you control. "Till the soil, spare no soul. / Neath the darkness, nightmares grow." —Children's nursery rhyme