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.

Diabolic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Scatter the Seeds

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Create three 1/1 green Saproling creature tokens.

Dusk Legion Zealot

When this creature enters, you draw a card and you lose 1 life.

Jayemdae Tome

Snow-Covered Swamp

Haunted Mire

({T}: Add {B} or {G}.)
This land enters tapped.

Wilderness Reclamation

At the beginning of your end step, untap all lands you control.

Elvish Visionary

Genesis Hydra

When you cast this spell, reveal the top X cards of your library. You may put a nonland permanent card with mana value X or less from among them onto the battlefield. Then shuffle the rest into your library.
This creature enters with X +1/+1 counters on it.

Contract from Below

Remove Contract from Below from your deck before playing if you're not playing for ante.
Discard your hand, ante the top card of your library, then draw seven cards.

Demonic Tutor

Dimir House Guard

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Sacrifice a creature: Regenerate this creature.
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.)

Jeweled Bird

Remove this card from your deck before playing if you're not playing for ante.
{T}: Ante this artifact. If you do, put all other cards you own from the ante into your graveyard, then draw a card.

Witch's Cottage

({T}: Add {B}.)
This land enters tapped unless you control three or more other Swamps.
When this land enters untapped, you may put target creature card from your graveyard on top of your library.

Woodland Chasm

Sengir Autocrat

When this creature enters, create three 0/1 black Serf creature tokens.
When this creature leaves the battlefield, exile all Serf tokens.

Regrowth

Return target card from your graveyard to your hand.

Hecatomb

When Hecatomb enters, sacrifice Hecatomb unless you sacrifice four creatures.
Tap an untapped Swamp you control: Hecatomb deals 1 damage to any target.

Sol Ring

Snow-Covered Forest

Bayou

Into the North

Search your library for a snow land card, put it onto the battlefield tapped, then shuffle.