Swamp

Order of the Ebon Hand

Protection from white
{B}: This creature gains first strike until end of turn.
{B}{B}: This creature gets +1/+0 until end of turn.

Knight of Stromgald

Gloom

White spells cost {3} more to cast.
Activated abilities of white enchantments cost {3} more to activate.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Dread of Night

Sinister Strength

Enchant creature
Enchanted creature gets +3/+1 and is black.

Talara's Bane

Target opponent reveals their hand. You choose a green or white creature card from it. You gain life equal to that creature card's toughness, then that player discards that card.

Howl from Beyond

Target creature gets +X/+0 until end of turn.

Eastern Paladin

{B}{B}, {T}: Destroy target green creature.

Slay

Destroy target green creature. It can't be regenerated.
Draw a card.

Stench of Evil

Destroy all Plains. For each land destroyed this way, Stench of Evil deals 1 damage to that land's controller unless they pay {2}.

Deathgrip

Execute

Destroy target white creature. It can't be regenerated.
Draw a card.

Stromgald Cabal

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

Dauthi Horror

Shadow (This creature can block or be blocked by only creatures with shadow.)
This creature can't be blocked by white creatures.

Western Paladin

{B}{B}, {T}: Destroy target white creature.

Dross Golem

Affinity for Swamps (This spell costs {1} less to cast for each Swamp you control.)
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Deathmark

Black Knight

First strike (This creature deals combat damage before creatures without first strike.)
Protection from white (This creature can't be blocked, targeted, dealt damage, or enchanted by anything white.)

Frightcrawler

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Threshold — As long as seven or more cards are in your graveyard, this creature gets +2/+2 and can't block.

Dunerider Outlaw

Protection from green
At the beginning of each end step, if this creature dealt damage to an opponent this turn, put a +1/+1 counter on it.