At the beginning of your end step, if you control exactly one creature, create a 5/5 black Demon creature token with flying.

Enchant creature

Enchanted creature gets +1/+1 and has menace and trample.

When Demonic Ruckus is put into a graveyard from the battlefield, draw a card.

Plot {R} (You may pay {R} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Flying

At the beginning of your upkeep, sacrifice a creature other than Demonic Taskmaster.

Enchant creature

Enchanted creature can’t attack.

Prevent all combat damage that would be dealt by enchanted creature.

{TK}{TK} — Outlast {1} ({1}, {T}: Put a +1/+1 counter on this creature. Outlast only as a sorcery.)

{TK}{TK}{TK} — When this permanent dies, you get seven {TK}.

{TK}{TK} — 1/4

{TK}{TK}{TK}{TK}{TK} — 9/6

Search your library for a card, put that card into your hand, then shuffle.

Enchant creature

Enchanted creature gets +1/+1.

When enchanted creature dies, return that card to its owner’s hand.

Flying, trample

When Demonlord Belzenlok enters the battlefield, exile cards from the top of your library until you exile a nonland card, then put that card into your hand. If the card’s mana value is 4 or greater, repeat this process. Demonlord Belzenlok deals 1 damage to you for each card put into your hand this way.

Flying

When Demonlord of Ashmouth enters the battlefield, exile it unless you sacrifice another creature.

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner’s control with a +1/+1 counter on it.)

Equipped creature gets +4/+2.

Equip—Sacrifice a creature.

As an additional cost to cast this spell, sacrifice a creature.

Flying, trample

Flying

When Demon of Dark Schemes enters the battlefield, all other creatures get -2/-2 until end of turn.

Whenever another creature dies, you get {E} (an energy counter).

{2}{B}, Pay {E}{E}{E}{E}: Put target creature card from a graveyard onto the battlefield under your control tapped.

You may pay 6 life and sacrifice three black creatures rather than pay this spell’s mana cost.

Flying, trample

Flying, trample

Once during each of your turns, you may cast an enchantment spell by paying life equal to its mana value rather than paying its mana cost.

{2}{B}, Sacrifice another enchantment: Demon of Fate’s Design gets +X/+0 until end of turn, where X is the sacrificed enchantment’s mana value.

Flying, trample

Whenever Demon of Loathing deals combat damage to a player, that player sacrifices a creature.

Flying

Lieutenant — As long as you control your commander, Demon of Wailing Agonies gets +2/+2 and has “Whenever Demon of Wailing Agonies deals combat damage to a player, that player sacrifices a creature.”

When Demon’s Disciple enters the battlefield, each player sacrifices a creature or planeswalker.

Scry 2, then draw two cards. You lose 2 life.

Target creature gets -5/-5 until end of turn.

{2}{B}, {T}, Sacrifice a blue creature, a black creature, and a red creature: Search your library for a card named Prince of Thralls, put it onto the battlefield, then shuffle.