+1: Each opponent discards a card and loses 2 life.
-3: Gain control of target creature until end of turn. Untap it. It gains haste until end of turn. Sacrifice it at the beginning of the next end step if it has mana value 3 or less.
-8: Each opponent loses life equal to the number of cards in their graveyard.
L:
4
{2}
Ankh of Mishra
Artifact
Whenever a land enters the battlefield, Ankh of Mishra deals 2 damage to that land's controller.
{8}{R}
Blasphemous Act
Sorcery
This spell costs {1} less to cast for each creature on the battlefield.
Blasphemous Act deals 13 damage to each creature.
{3}{B}{B}
Bloodgift Demon
Creature - Demon
Flying
At the beginning of your upkeep, target player draws a card and loses 1 life.
5 /
4
{3}{R}
Burning Earth
Enchantment
Whenever a player taps a nonbasic land for mana, Burning Earth deals 1 damage to that player.
--
Canyon Slough
Land - Swamp Mountain
({T}: Add {B} or {R}.)
Canyon Slough enters the battlefield tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)
{2}{R}
Chaos Warp
Instant
The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.
{2}{R}
Citadel of Pain
Enchantment
At the beginning of each player's end step, Citadel of Pain deals X damage to that player, where X is the number of untapped lands they control.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{3}
Crawlspace
Artifact
No more than two creatures can attack you each combat.
{3}{B}
Crypt Ghast
Creature - Spirit
Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)
Whenever you tap a Swamp for mana, add an additional {B}.
2 /
2
{3}
Cryptolith Fragment
Artifact
Cryptolith Fragment enters the battlefield tapped.
{T}: Add one mana of any color. Each player loses 1 life.
At the beginning of your upkeep, if each player has 10 or less life, transform Cryptolith Fragment.
--
Aurora of Emrakul
Creature - Eldrazi Reflection
Flying, deathtouch
Whenever Aurora of Emrakul attacks, each opponent loses 3 life.
{1}{R}{ // }{X}{B}{B}
Cut // Ribbons
Sorcery // Sorcery
Cut deals 4 damage to target creature.
Aftermath (Cast this spell only from your graveyard. Then exile it.)
Each opponent loses X life.
{4}{B}{B}
Deadly Tempest
Sorcery
Destroy all creatures. Each player loses life equal to the number of creatures they controlled that were destroyed this way.
{X}{B}{B}{B}
Death Cloud
Sorcery
Each player loses X life, discards X cards, sacrifices X creatures, then sacrifices X lands.
{2}{B}{B}
Diabolic Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle.
{3}{R}{R}
Dictate of the Twin Gods
Enchantment
Flash
If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.
{3}{B}{B}
Dire Fleet Ravager
Creature - Orc Pirate Wizard
Menace, deathtouch
When Dire Fleet Ravager enters the battlefield, each player loses a third of their life, rounded up.
4 /
4
{2}{R}{R}
Disrupt Decorum
Sorcery
Goad all creatures you don't control. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.)
{1}{B}
Doom Blade
Instant
Destroy target nonblack creature.
--
Dragonskull Summit
Land
Dragonskull Summit enters the battlefield tapped unless you control a Swamp or a Mountain.
{T}: Add {B} or {R}.
{2}
Ebony Owl Netsuke
Artifact
At the beginning of each opponent's upkeep, if that player has seven or more cards in hand, Ebony Owl Netsuke deals 4 damage to that player.
{2}{B/R}
Everlasting Torment
Enchantment
Players can't gain life.
Damage can't be prevented.
All damage is dealt as though its source had wither. (A source with wither deals damage to creatures in the form of -1/-1 counters.)
{X}{B}{B}
Exsanguinate
Sorcery
Each opponent loses X life. You gain life equal to the life lost this way.
{3}{B}
Fate Unraveler
Enchantment Creature - Hag
Whenever an opponent draws a card, Fate Unraveler deals 1 damage to that player.
3 /
4
{2}
Fellwar Stone
Artifact
{T}: Add one mana of any color that a land an opponent controls could produce.
--
Foreboding Ruins
Land
As Foreboding Ruins enters the battlefield, you may reveal a Swamp or Mountain card from your hand. If you don't, Foreboding Ruins enters the battlefield tapped.
{T}: Add {B} or {R}.
{3}{B}{B}
Fraying Omnipotence
Sorcery
Each player loses half their life, then discards half the cards in their hand, then sacrifices half the creatures they control. Round up each time.
{1}{R}{R}{R}
Furnace of Rath
Enchantment
If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.
--
Geier Reach Sanitarium
Legendary Land
{T}: Add {C}.
{2}, {T}: Each player draws a card, then discards a card.
--
Graven Cairns
Land
{T}: Add {C}.
{B/R}, {T}: Add {B}{B}, {B}{R}, or {R}{R}.
{3}{B}{B}
Gray Merchant of Asphodel
Creature - Zombie
When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)
2 /
4
--
Grixis Panorama
Land
{T}: Add {C}.
{1}, {T}, Sacrifice Grixis Panorama: Search your library for a basic Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.
{1}{R}
Harsh Mentor
Creature - Human Cleric
Whenever an opponent activates an ability of an artifact, creature, or land on the battlefield, if it isn't a mana ability, Harsh Mentor deals 2 damage to that player.
2 /
2
{4}{B}{R}
Havoc Festival
Enchantment
Players can't gain life.
At the beginning of each player's upkeep, that player loses half their life, rounded up.
{3}{R}{R}
Heartless Hidetsugu
Legendary Creature - Ogre Shaman
{T}: Heartless Hidetsugu deals damage to each player equal to half that player's life total, rounded down.
4 /
3
{3}
Horn of Greed
Artifact
Whenever a player plays a land, that player draws a card.
{2}
Howling Mine
Artifact
At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.
{1}{R}
Humble Defector
Creature - Human Rogue
{T}: Draw two cards. Target opponent gains control of Humble Defector. Activate only during your turn.
2 /
1
{3}
Iron Maiden
Artifact
At the beginning of each opponent's upkeep, Iron Maiden deals X damage to that player, where X is the number of cards in their hand minus 4.
--
Jund Panorama
Land
{T}: Add {C}.
{1}, {T}, Sacrifice Jund Panorama: Search your library for a basic Swamp, Mountain, or Forest card, put it onto the battlefield tapped, then shuffle.
{B}
Kederekt Parasite
Creature - Horror
Whenever an opponent draws a card, if you control a red permanent, you may have Kederekt Parasite deal 1 damage to that player.
1 /
1
{X}{B}
Killing Wave
Sorcery
For each creature, its controller sacrifices it unless they pay X life.
{2}{B}{B}
Koskun Falls
World Enchantment
At the beginning of your upkeep, sacrifice Koskun Falls unless you tap an untapped creature you control.
Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.
{1}{B}{R}
Last One Standing
Sorcery
Choose a creature at random, then destroy the rest.
--
Luxury Suite
Land
Luxury Suite enters the battlefield tapped unless you have two or more opponents.
{T}: Add {B} or {R}.
{3}{R}
Manabarbs
Enchantment
Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.
{1}{B}{B}
Master of the Feast
Enchantment Creature - Demon
Flying
At the beginning of your upkeep, each opponent draws a card.
5 /
5
{2}
Mind Stone
Artifact
{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.
{3}
Misers' Cage
Artifact
At the beginning of each opponent's upkeep, if that player has five or more cards in hand, Misers' Cage deals 2 damage to that player.
{2}{B}{R}
Mogis, God of Slaughter
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to black and red is less than seven, Mogis isn't a creature.
At the beginning of each opponent's upkeep, Mogis deals 2 damage to that player unless they sacrifice a creature.
7 /
5
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{3}{R}{R}
Neheb, the Eternal
Legendary Creature - Zombie Minotaur Warrior
Afflict 3 (Whenever this creature becomes blocked, defending player loses 3 life.)
At the beginning of your postcombat main phase, add {R} for each 1 life your opponents have lost this turn.
4 /
6
{4}
Otherworld Atlas
Artifact
{T}: Put a charge counter on Otherworld Atlas.
{T}: Each player draws a card for each charge counter on Otherworld Atlas.
{3}{B}{B}
Painful Quandary
Enchantment
Whenever an opponent casts a spell, that player loses 5 life unless they discard a card.
{2}{R}
Price of Glory
Enchantment
Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.
{6}{B}
Price of Knowledge
Enchantment
Players have no maximum hand size.
At the beginning of each opponent's upkeep, Price of Knowledge deals damage to that player equal to the number of cards in that player's hand.
{B}{R}
Rain of Gore
Enchantment
If a spell or ability would cause its controller to gain life, that player loses that much life instead.
{2}
Rakdos Signet
Artifact
{1}, {T}: Add {B}{R}.
--
Reliquary Tower
Land
You have no maximum hand size.
{T}: Add {C}.
--
Rocky Tar Pit
Land
Rocky Tar Pit enters the battlefield tapped.
{T}, Sacrifice Rocky Tar Pit: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.
{3}{B}{B}
Seizan, Perverter of Truth
Legendary Creature - Demon Spirit
At the beginning of each player's upkeep, that player loses 2 life and draws two cards.
6 /
5
--
Shadowblood Ridge
Land
{1}, {T}: Add {B}{R}.
{4}
Skullcage
Artifact
At the beginning of each opponent's upkeep, Skullcage deals 2 damage to that player unless they have exactly three or exactly four cards in hand.
--
Smoldering Marsh
Land - Swamp Mountain
({T}: Add {B} or {R}.)
Smoldering Marsh enters the battlefield tapped unless you control two or more basic lands.
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{2}{R}
Spellshock
Enchantment
Whenever a player casts a spell, Spellshock deals 2 damage to that player.
{2}{B/R}{B/R}
Spiteful Visions
Enchantment
At the beginning of each player's draw step, that player draws an additional card.
Whenever a player draws a card, Spiteful Visions deals 1 damage to that player.
{1}{B}{B}
Sudden Spoiling
Instant
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Until end of turn, creatures target player controls lose all abilities and have base power and toughness 0/2.
{1}{R}{R}
Sulfuric Vortex
Enchantment
At the beginning of each player's upkeep, Sulfuric Vortex deals 2 damage to that player.
If a player would gain life, that player gains no life instead.
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Tainted Peak
Land
{T}: Add {C}.
{T}: Add {B} or {R}. Activate only if you control a Swamp.
{2}
Talisman of Indulgence
Artifact
{T}: Add {C}.
{T}: Add {B} or {R}. Talisman of Indulgence deals 1 damage to you.
{3}
Temple Bell
Artifact
{T}: Each player draws a card.
{B}{R}
Terminate
Instant
Destroy target creature. It can't be regenerated.
{2}
Thought Vessel
Artifact
You have no maximum hand size.
{T}: Add {C}.
{4}
Thran Dynamo
Artifact
{T}: Add {C}{C}{C}.
{X}{B}{B}
Torment of Hailfire
Sorcery
Repeat the following process X times. Each opponent loses 3 life unless that player sacrifices a nonland permanent or discards a card.
{B}{B}{B}
Underworld Dreams
Enchantment
Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.
{4}
Viseling
Artifact Creature - Phyrexian Construct
At the beginning of each opponent's upkeep, Viseling deals X damage to that player, where X is the number of cards in their hand minus 4.
2 /
2
{1}{R}{R}
Zo-Zu the Punisher
Legendary Creature - Goblin Warrior
Whenever a land enters the battlefield, Zo-Zu the Punisher deals 2 damage to that land's controller.
2 /
2
{2/B}{2/B}{2/B}
Beseech the Queen
Sorcery
({2/B} can be paid with any two mana or with {B}. This card's mana value is 6.)
Search your library for a card with mana value less than or equal to the number of lands you control, reveal it, put it into your hand, then shuffle.