Nirkana Revenant

Whenever you tap a Swamp for mana, add an additional {B}.
{B}: This creature gets +1/+1 until end of turn.

Perilous Shadow

{1}{B}: This creature gets +2/+2 until end of turn.

Mire Shade

{B}, Sacrifice a Swamp: Put a +1/+1 counter on this creature. Activate only as a sorcery.

Dungeon Shade

Flying
{B}: This creature gets +1/+1 until end of turn.

Deepwood Legate

If an opponent controls a Forest and you control a Swamp, you may cast this spell without paying its mana cost.
{B}: This creature gets +1/+1 until end of turn.

Fetid Horror

{B}: This creature gets +1/+1 until end of turn.

Evernight Shade

{B}: This creature gets +1/+1 until end of turn.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Ihsan's Shade

Darkling Stalker

{B}: Regenerate this creature.
{B}: This creature gets +1/+1 until end of turn.

Bad Moon

Author of Shadows

When this creature enters, exile all opponents' graveyards. Choose a nonland card exiled this way. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.

Gateway Shade

{B}: This creature gets +1/+1 until end of turn.
Tap an untapped Gate you control: This creature gets +2/+2 until end of turn.

Snow-Covered Swamp

Nightwing Shade

Flying
{1}{B}: This creature gets +1/+1 until end of turn.

Liliana's Shade

When this creature enters, you may search your library for a Swamp card, reveal it, put it into your hand, then shuffle.
{B}: This creature gets +1/+1 until end of turn.

Chilling Shade

Flying
{S}: This creature gets +1/+1 until end of turn. ({S} can be paid with one mana from a snow source.)

Looming Shade

Tattered Apparition

Slithering Shade

Defender (This creature can't attack.)
{B}: This creature gets +1/+1 until end of turn.
Hellbent — This creature can attack as though it didn't have defender as long as you have no cards in hand.

Undercity Shade

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
{B}: This creature gets +1/+1 until end of turn.

Nakaya Shade

{B}: This creature gets +1/+1 until end of turn unless any player pays {2}.

Thirsting Shade

Lifelink
{2}{B}: This creature gets +1/+1 until end of turn.

Nantuko Shade

Veiled Shade

{1}{B}: This creature gets +1/+1 until end of turn.

Hoar Shade

Whispering Shade

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
{B}: This creature gets +1/+1 until end of turn.

Misery's Shadow

If a creature an opponent controls would die, exile it instead.
{1}: This creature gets +1/+1 until end of turn.

Drifting Shade

Crypt Ripper

Haste
{B}: This creature gets +1/+1 until end of turn.

Herald's Horn

As this artifact enters, choose a creature type.
Creature spells you cast of the chosen type cost {1} less to cast.
At the beginning of your upkeep, look at the top card of your library. If it's a creature card of the chosen type, you may reveal it and put it into your hand.

Skyclave Shade

Kicker {2}{B}
This creature can't block.
If this creature was kicked, it enters with two +1/+1 counters on it.
Landfall — Whenever a land you control enters, if this card is in your graveyard and it's your turn, you may cast it from your graveyard this turn.

Coat of Arms

Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)

Zof Shade

{2}{B}: This creature gets +2/+2 until end of turn.

Frozen Shade

Pestilence

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