Flying, trample

You can't win the game and your opponents can't lose the game.

{T}: Add one mana of any color in your commander's color identity.

Flying

Archfiend of the Dross enters the battlefield with four oil counters on it.

At the beginning of your upkeep, remove an oil counter from Archfiend of the Dross. Then if it has no oil counters on it, you lose the game.

Whenever a creature an opponent controls dies, its controller loses 2 life.

Flying, deathtouch

When Baleful Strix enters the battlefield, draw a card.

Flying

Whenever Bellowing Fiend deals damage to a creature, Bellowing Fiend deals 3 damage to that creature's controller and 3 damage to you.

Flying, trample

Whenever an opponent casts a spell, that player creates a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.")

Whenever Bloodvial Purveyor attacks, it gets +1/+0 until end of turn for each Blood token defending player controls.

{T}: Add one mana of any color in your commander's color identity.

Enchant player

Whenever enchanted player is attacked, you draw a card. Each opponent attacking that player does the same.

Flying

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

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Whenever a player casts a spell, sacrifice a creature.

Drinker of Sorrow can't block.

Whenever Drinker of Sorrow deals combat damage, sacrifice a permanent.

Flying

Whenever a player casts a spell, you lose 1 life.

Whenever Ebonblade Reaper attacks, you lose half your life, rounded up.

Whenever Ebonblade Reaper deals combat damage to a player, that player loses half their life, rounded up.

Morph {3}{B}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Amplify 1 (As this creature enters the battlefield, put a +1/+1 counter on it for each Zombie card you reveal in your hand.)

Whenever Embalmed Brawler attacks or blocks, you lose 1 life for each +1/+1 counter on it.

When Exchange of Words enters the battlefield, choose two target creatures. For as long as Exchange of Words remains on the battlefield, exchange the text boxes of those creatures.

Draw cards equal to the mana value of target artifact or creature you control. An opponent gains control of that permanent.

Whenever Filthy Cur is dealt damage, you lose that much life.

Whenever Flesh Reaver deals damage to a creature or opponent, Flesh Reaver deals that much damage to you.

Neurotraumal Rod -- Whenever a creature attacks you, it gets -1/-0 until end of turn.

Whenever a creature attacks one of your opponents, it gets +0/+1 until end of turn.

If a creature an opponent controls would die, exile it instead.

At the beginning of your upkeep, put all creature cards exiled with Gisa, Glorious Resurrector onto the battlefield under your control. They gain decayed. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)

At the beginning of your upkeep, sacrifice a permanent.

Whenever Greater Harvester deals combat damage to a player, that player sacrifices two permanents.

You can't cast creature spells.

Whenever Grollub is dealt damage, each opponent gains that much life.

Whenever Hasran Ogress attacks, it deals 3 damage to you unless you pay {2}.

Whenever Havengul Skaab attacks, return another creature you control to its owner's hand.

Whenever a creature attacks you, its controller loses 1 life.

At the beginning of your end step, target opponent gains control of up to one target creature you control. Put two +1/+1 counters on it and tap it. It's goaded for the rest of the game and it gains "This creature can't be sacrificed." (It attacks each combat if able and attacks a player other than you if able.)

Whenever a creature you own but don't control attacks, you draw a card.

Flying, trample

At the beginning of your upkeep, sacrifice a creature other than Liege of the Pit. If you can't, Liege of the Pit deals 7 damage to you.

Morph {B}{B}{B}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)

Equip {0}

Flying, trample

At the beginning of your upkeep, sacrifice a creature other than Lord of the Pit. If you can't, Lord of the Pit deals 7 damage to you.

When Marchesa's Decree enters the battlefield, you become the monarch.

Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life.

Flying

At the beginning of your upkeep, each opponent draws a card.

Exchange control of two target creatures controlled by different players. If you control neither creature, draw three cards.

Menace (This creature can't be blocked except by two or more creatures.)

Whenever Morkrut Necropod attacks or blocks, sacrifice another creature or land.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

At the beginning of your upkeep, sacrifice a creature if you don't control an Ogre.

Trample

Whenever Phyrexian Negator is dealt damage, sacrifice that many permanents.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

At the beginning of your upkeep, you get a poison counter.

When Priest of the Blood Rite enters the battlefield, create a 5/5 black Demon creature token with flying.

At the beginning of your upkeep, you lose 2 life.

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life and you gain 1 life.

At the beginning of your upkeep, discard a card.

Flying

At the beginning of your upkeep, sacrifice an artifact other than Rust Elemental. If you can't, tap Rust Elemental and you lose 4 life.

{T}: Add {C}{C}.

Partner with Soulblade Renewer (When this creature enters the battlefield, target player may put Soulblade Renewer into their hand from their library, then shuffle.)

Deathtouch

Whenever a creature with a +1/+1 counter on it attacks one of your opponents, that creature gains deathtouch until end of turn.

You can't cast creature spells.

({T}: Add {U} or {B}.)

Sunken Hollow enters the battlefield tapped unless you control two or more basic lands.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)

Equip {1}

At the beginning of each end step, if an opponent lost 3 or more life this turn, you may draw a card. (Damage causes loss of life.)

Whenever Takenuma Bleeder attacks or blocks, you lose 1 life if you don't control a Demon.

Trample

Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)

At the beginning of your upkeep, all lands you control phase out. (They phase in before you untap during your next untap step.)

Flying

Whenever Tethered Skirge becomes the target of a spell or ability, you lose 1 life.

{T}: Target creature an opponent controls with power less than or equal to The Master's power gains skulk until end of turn. Goad it. (A creature with skulk can't be blocked by creatures with greater power.)

Whenever a creature with skulk deals combat damage to one of your opponents, put a +1/+1 counter on The Master and draw a card.

Flying

Your maximum hand size is reduced by four.

Flying

Your maximum hand size is reduced by three.

Targeting Relay -- At the beginning of combat on your turn, choose an opponent.

Creatures attacking the last chosen player have menace.

Whenever another creature enters the battlefield, you lose 1 life.

Target opponent gains control of target creature. (If an attacking or blocking creature changes controllers, it's removed from combat.)

Protection from Humans

Pay 1 life, Sacrifice another creature: Put a -1/-1 counter on up to one target creature and draw a card.

{B}{B}, Discard a card: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When Yukora, the Prisoner leaves the battlefield, sacrifice all non-Ogre creatures you control.