Counterspell

Dark Ritual

Hollow Dogs

Whenever this creature attacks, it gets +2/+0 until end of turn.

Ebon Stronghold

This land enters tapped.
{T}: Add {B}.
{T}, Sacrifice this land: Add {B}{B}.

Clockwork Avian

Flying
This creature enters with four +1/+0 counters on it.
At end of combat, if this creature attacked or blocked this combat, remove a +1/+0 counter from it.
{X}, {T}: Put up to X +1/+0 counters on this creature. This ability can't cause the total number of +1/+0 counters on this creature to be greater than four. Activate only during your upkeep.

Gravedigger

When this creature enters, you may return target creature card from your graveyard to your hand.

Island

Diabolic Edict

Target player sacrifices a creature of their choice.

Skittering Horror

When you cast a creature spell, sacrifice this creature.

Vigilant Drake

Sengir Vampire

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.

Polluted Mire

This land enters tapped.
{T}: Add {B}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Tar Pit Warrior

When this creature becomes the target of a spell or ability, sacrifice it.

Fog Elemental

Flying (This creature can't be blocked except by creatures with flying or reach.)
When this creature attacks or blocks, sacrifice it at end of combat.

Gaseous Form

Enchant creature
Prevent all combat damage that would be dealt to and dealt by enchanted creature.

Skittering Skirge

Flying
When you cast a creature spell, sacrifice this creature.

Cloud Djinn

Flying
This creature can block only creatures with flying.

Fallen Angel

Flying
Sacrifice a creature: This creature gets +2/+1 until end of turn.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Remote Isle

This land enters tapped.
{T}: Add {U}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Feral Shadow

Power Sink

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Tolarian Winds

Discard all the cards in your hand, then draw that many cards.

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Wayward Soul

Flying
{U}: Put this creature on top of its owner's library.

Diabolic Vision

Look at the top five cards of your library. Put one of them into your hand and the rest on top of your library in any order.

Giant Crab

{U}: This creature gains shroud until end of turn. (It can't be the target of spells or abilities.)

Svyelunite Temple

This land enters tapped.
{T}: Add {U}.
{T}, Sacrifice this land: Add {U}{U}.

Coercion

Target opponent reveals their hand. You choose a card from it. That player discards that card.

Bone Harvest

Put any number of target creature cards from your graveyard on top of your library.
Draw a card at the beginning of the next turn's upkeep.

Leviathan

Trample
This creature enters tapped and doesn't untap during your untap step.
At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap this creature.
This creature can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)

Drain Life

Spend only black mana on X.
Drain Life deals X damage to any target. You gain life equal to the damage dealt, but not more life than the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

Snapping Drake

Flying (This creature can't be blocked except by creatures with flying or reach.)

Cloud Elemental

Killer Whale

{U}: This creature gains flying until end of turn.

Air Elemental

Swamp

Mahamoti Djinn

Death Stroke

Blizzard Elemental

Impulse

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.