Knight of Glory

Protection from black (This creature can't be blocked, targeted, dealt damage, or enchanted by anything black.)
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Cemetery Gate

Defender (This creature can't attack.)
Protection from black

Plains

Urborg, Tomb of Yawgmoth

Each land is a Swamp in addition to its other land types.

Swamp

Disciple of Grace

Protection from black
Cycling {2} ({2}, Discard this card: Draw a card.)

Dimir House Guard

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Sacrifice a creature: Regenerate Dimir House Guard.
Transmute {1}{B}{B} ({1}{B}{B}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Death Speakers

Idyllic Tutor

Search your library for an enchantment card, reveal it, put it into your hand, then shuffle.

Duskrider Falcon

Darkest Hour

Sphere of Grace

If a black source would deal damage to you, prevent 2 of that damage.

Pestilence

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Pestilence.
{B}: Pestilence deals 1 damage to each creature and each player.

Auriok Champion

Protection from black and from red
Whenever another creature enters the battlefield, you may gain 1 life.