
Enchantment Creature — Demon ·
Nightmare Shepherd is part of 1 combo legal in Commander. Often combined with Eternal Scourge and Ashnod's Altar.
Flying
Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of that creature, except it's 1/1 and it's a Nightmare in addition to its other types.
The cards that most often join Nightmare Shepherd across all of its 1 combo.
Nightmare Shepherd can stand in for these generic cards, so it also fits the combos that require them.