Bog Imp

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

Mind Rot

Coercion

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

Dehydration

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature doesn't untap during its controller's untap step.

Twiddle

You may tap or untap target artifact, creature, or land.

Nightmare

Flying (This creature can't be blocked except by creatures with flying or reach.)
Nightmare's power and toughness are each equal to the number of Swamps you control.

Carrion Wall

Defender (This creature can't attack.)
{1}{B}: Regenerate Carrion Wall.

Horned Turtle

Wind Drake

Unsummon

Return target creature to its owner's hand.

Catalog

Flash Counter

Drudge Skeletons

{B}: Regenerate Drudge Skeletons. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

Island

Swamp

Ambition's Cost

You draw three cards and you lose 3 life.

Coral Eel

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Megrim

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Concentrate

Bog Wraith

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Mana Leak

Counter target spell unless its controller pays {3}.

Sage Owl

Flying
When Sage Owl enters, look at the top four cards of your library, then put them back in any order.

Nausea

All creatures get -1/-1 until end of turn.

Dark Banishing

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

Steal Artifact

Enchant artifact
You control enchanted artifact.

Nekrataal

First strike
When Nekrataal enters, destroy target nonartifact, nonblack creature. That creature can't be regenerated.