Nightmarish End

Instant

Yarok's Fenlurker

Creature — Horror

Hypnox

Creature — Nightmare Horror

Entropic Specter

Creature — Specter Spirit

Ob Nixilis, the Hate-Twisted

Legendary Planeswalker — Nixilis

Nightmare Unmaking

Sorcery

Ob Nixilis Reignited

Legendary Planeswalker — Nixilis

Nightshade Seer

Creature — Human Wizard

Black Vise

Artifact

Mesmeric Fiend

Creature — Nightmare Horror

Scent of Nightshade

Instant

Sycorax Commander

Creature — Alien Soldier

Planeswalker's Scorn

Enchantment

Flunk

Instant

Lavaborn Muse

Creature — Spirit

Enemy of Enlightenment

Enchantment Creature — Demon

Viseling

Artifact Creature — Phyrexian Construct

Thought-Stalker Warlock

Creature — Lizard Warlock

Nyx Weaver

Enchantment Creature — Spider

Ghastlord of Fugue

Creature — Spirit Avatar

Blight-Breath Catoblepas

Creature — Beast

Keen Duelist

Creature — Human Wizard

Sly Spy

Creature — Human Spy

Haunter of Nightveil

Creature — Spirit

Gix, Yawgmoth Praetor

Legendary Creature — Phyrexian Praetor

Chupacabra Echo

Creature — Beast Horror Spirit

Thought-Knot Seer

Creature — Eldrazi

Singe-Mind Ogre

Creature — Ogre Mutant

Exile into Darkness

Sorcery

Hellfire Mongrel

Creature — Elemental Dog

Sandstone Oracle

Artifact Creature — Sphinx