Wall of Dust

Defender (This creature can't attack.)
Whenever Wall of Dust blocks a creature, that creature can't attack during its controller's next turn.

Serpent Generator

{4}, {T}: Create a 1/1 colorless Snake artifact creature token. It has "Whenever this creature deals damage to a player, that player gets a poison counter." (A player with ten or more poison counters loses the game.)

Sol'kanar the Swamp King

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Whenever a player casts a black spell, you gain 1 life.

Giant Strength

Enchant creature
Enchanted creature gets +2/+2.

Red Mana Battery

{2}, {T}: Put a charge counter on Red Mana Battery.
{T}, Remove any number of charge counters from Red Mana Battery: Add {R}, then add an additional {R} for each charge counter removed this way.

Glyph of Delusion

Put X glyph counters on target creature that target Wall blocked this turn, where X is the power of that blocked creature. The creature gains "This creature doesn't untap during your untap step if it has a glyph counter on it" and "At the beginning of your upkeep, remove a glyph counter from this creature."

Boris Devilboon

{2}{B}{R}, {T}: Create a 1/1 black and red Demon creature token named Minor Demon.

Eternal Warrior

Enchant creature
Enchanted creature has vigilance.

Sentinel

{0}: Change Sentinel's base toughness to 1 plus the power of target creature blocking or blocked by Sentinel. (This effect lasts indefinitely.)

Infernal Medusa

Whenever Infernal Medusa blocks a creature, destroy that creature at end of combat.
Whenever Infernal Medusa becomes blocked by a non-Wall creature, destroy that creature at end of combat.

The Wretched

At end of combat, gain control of all creatures blocking The Wretched for as long as you control The Wretched.

Wall of Wonder

Defender (This creature can't attack.)
{2}{U}{U}: Wall of Wonder gets +4/-4 until end of turn and can attack this turn as though it didn't have defender.

Blue Mana Battery

{2}, {T}: Put a charge counter on Blue Mana Battery.
{T}, Remove any number of charge counters from Blue Mana Battery: Add {U}, then add an additional {U} for each charge counter removed this way.

Mana Drain

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

Nicol Bolas

Flying
At the beginning of your upkeep, sacrifice Nicol Bolas unless you pay {U}{B}{R}.
Whenever Nicol Bolas deals damage to an opponent, that player discards their hand.

Walking Dead

Nebuchadnezzar

{X}, {T}: Choose a card name. Target opponent reveals X cards at random from their hand. Then that player discards all cards with that name revealed this way. Activate only during your turn.

Wall of Putrid Flesh

Defender (This creature can't attack.)
Protection from white
Prevent all damage that would be dealt to Wall of Putrid Flesh by enchanted creatures.

Spectral Cloak

Enchant creature
Enchanted creature has shroud as long as it's untapped. (It can't be the target of spells or abilities.)

Life Matrix

{4}, {T}: Put a matrix counter on target creature and that creature gains "Remove a matrix counter from this creature: Regenerate this creature." Activate only during your upkeep.

Hellfire

Destroy all nonblack creatures. Hellfire deals X plus 3 damage to you, where X is the number of creatures that died this way.

Wall of Vapor

Defender (This creature can't attack.)
Prevent all damage that would be dealt to Wall of Vapor by creatures it's blocking.

Venarian Gold

Enchant creature
When Venarian Gold enters the battlefield, tap enchanted creature and put X sleep counters on it.
Enchanted creature doesn't untap during its controller's untap step if it has a sleep counter on it.
At the beginning of the upkeep of enchanted creature's controller, remove a sleep counter from that creature.

Force Spike

Counter target spell unless its controller pays {1}.

Princess Lucrezia

Arena of the Ancients

Legendary creatures don't untap during their controllers' untap steps.
When Arena of the Ancients enters the battlefield, tap all legendary creatures.

Chains of Mephistopheles

If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card.

Riven Turnbull

Devouring Deep

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Recall

Discard X cards, then return a card from your graveyard to your hand for each card discarded this way. Exile Recall.

Brine Hag

When Brine Hag dies, change the base power and toughness of all creatures that dealt damage to it this turn to 0/2. (This effect lasts indefinitely.)

The Brute

Enchant creature
Enchanted creature gets +1/+0.
{R}{R}{R}: Regenerate enchanted creature.

Blood Lust

If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1.

Wall of Tombstones

Defender (This creature can't attack.)
At the beginning of your upkeep, change Wall of Tombstones's base toughness to 1 plus the number of creature cards in your graveyard. (This effect lasts indefinitely.)

Wall of Earth

Segovian Leviathan

Planar Gate

Creature spells you cast cost up to {2} less to cast.

Greed

Immolation

Enchant creature
Enchanted creature gets +2/-2.

Wall of Shadows

Defender (This creature can't attack.)
Prevent all damage that would be dealt to Wall of Shadows by creatures it's blocking.
Wall of Shadows can't be the target of spells that can target only Walls or of abilities that can target only Walls.

Glyph of Doom

Choose target Wall creature. At this turn's next end of combat, destroy all creatures that were blocked by that creature this turn.

Glyph of Destruction

Target blocking Wall you control gets +10/+0 until end of combat. Prevent all damage that would be dealt to it this turn. Destroy it at the beginning of the next end step.

Caverns of Despair

No more than two creatures can attack each combat.
No more than two creatures can block each combat.

Mountain

Demonic Torment

Enchant creature
Enchanted creature can't attack.
Prevent all combat damage that would be dealt by enchanted creature.

Black Mana Battery

{2}, {T}: Put a charge counter on Black Mana Battery.
{T}, Remove any number of charge counters from Black Mana Battery: Add {B}, then add an additional {B} for each charge counter removed this way.