Honorable Passage

The next time a source of your choice would deal damage to any target this turn, prevent that damage. If damage from a red source is prevented this way, Honorable Passage deals that much damage to the source's controller.

Order of the Sacred Torch

{T}, Pay 1 life: Counter target black spell.

Conversion

At the beginning of your upkeep, sacrifice Conversion unless you pay {W}{W}.
All Mountains are Plains.

Celestial Purge

Disenchant

Black Scarab

Enchant creature
Enchanted creature can't be blocked by black creatures.
Enchanted creature gets +2/+2 as long as an opponent controls a black permanent.

Red Scarab

Enchant creature
Enchanted creature can't be blocked by red creatures.
Enchanted creature gets +2/+2 as long as an opponent controls a red permanent.

Mask of Law and Grace

Enchant creature
Enchanted creature has protection from black and from red.

Sacred Knight

Sacred Knight can't be blocked by black and/or red creatures.

Starlight

You gain 3 life for each black creature target opponent controls.

Circle of Protection: Red

{1}: The next time a red source of your choice would deal damage to you this turn, prevent that damage.

Crimson Acolyte

Protection from red
{W}: Target creature gains protection from red until end of turn.

Plains

Order of Leitbur

Protection from black
{W}: Order of Leitbur gains first strike until end of turn.
{W}{W}: Order of Leitbur gets +1/+0 until end of turn.

Karma

At the beginning of each player's upkeep, Karma deals damage to that player equal to the number of Swamps they control.

Voice of Law

Soltari Monk

Protection from black
Shadow (This creature can block or be blocked by only creatures with shadow.)

Guardian of the Guildpact

Freewind Falcon

Exorcist

{1}{W}, {T}: Destroy target black creature.

Stern Judge

{T}: Each player loses 1 life for each Swamp they control.

Crown of Awe

Enchant creature
Enchanted creature has protection from black and from red.
Sacrifice Crown of Awe: Enchanted creature and other creatures that share a creature type with it gain protection from black and from red until end of turn.

Defender of Law

Warmth

Whenever an opponent casts a red spell, you gain 2 life.

Cho-Arrim Legate

If an opponent controls a Swamp and you control a Plains, you may cast this spell without paying its mana cost.
Protection from black

Northern Paladin

{W}{W}, {T}: Destroy target black permanent.

Voice of Grace

Circle of Protection: Black

{1}: The next time a black source of your choice would deal damage to you this turn, prevent that damage.

Mangara's Equity

As Mangara's Equity enters, choose black or red.
At the beginning of your upkeep, sacrifice Mangara's Equity unless you pay {1}{W}.
Whenever a creature of the chosen color deals damage to you or a white creature you control, Mangara's Equity deals that much damage to that creature.