Cavern of Souls

As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {1} to your mana pool. {T}: Add one mana of any color to your mana pool. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Ulvenwald Tracker

{1}{G}, {T}: Target creature you control fights another target creature. (Each deals damage equal to its power to the other.)

Boreal Druid

{T}: Add {1} to your mana pool.

Mikaeus, the Unhallowed

Intimidate Whenever a Human deals damage to you, destroy it. Other non-Human creatures you control get +1/+1 and have undying. (When a creature with undying 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.)

Varolz, the Scar-Striped

Each creature card in your graveyard has scavenge. The scavenge cost is equal to its mana cost. (Exile a creature card from your graveyard and pay its mana cost: Put a number of +1/+1 counters equal to that card's power on target creature. Scavenge only as a sorcery.) Sacrifice another creature: Regenerate Varolz, the Scar-Striped.

Minister of Pain

Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Minister of Pain exploits a creature, creatures your opponents control get -1/-1 until end of turn.

Bloom Tender

{T}: For each color among permanents you control, add one mana of that color to your mana pool.

Recurring Nightmare

Sacrifice a creature, Return Recurring Nightmare to owner's hand: Put target creature card from your graveyard into play. Play this ability as a sorcery.

Merciless Executioner

When Merciless Executioner enters the battlefield, each player sacrifices a creature.

Whisperwood Elemental

At the beginning of your end step, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.) Sacrifice Whisperwood Elemental: Until end of turn, face-up nontoken creatures you control gain "When this creature dies, manifest the top card of your library."

Dryad Arbor

(Dryad Arbor isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {G} to your mana pool.") Dryad Arbor is green.

Fyndhorn Elves

{T}: Add {G} to your mana pool. Play this ability as an interrupt.

Liliana of the Veil

+1: Each player discards a card. -2: Target player sacrifices a creature. -6: Separate all permanents target player controls into two piles. That player sacrifices all permanents in the pile of his or her choice.

Woodland Cemetery

Woodland Cemetery enters the battlefield tapped unless you control a Swamp or a Forest. {T}: Add {B} or {G} to your mana pool.

Phyrexian Delver

When Phyrexian Delver comes into play, return target creature card from your graveyard to play. You lose life equal to that card's converted mana cost.

Grim Haruspex

Morph {B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) Whenever another nontoken creature you control dies, draw a card.

Fauna Shaman

{G}, {T}, Discard a creature card: Search your library for a creature card, reveal it, and put it into your hand. Then shuffle your library.

Viscera Seer

Sacrifice a creature: Scry 1. (To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.)

Shadowborn Demon

Flying When Shadowborn Demon enters the battlefield, destroy target non-Demon creature. At the beginning of your upkeep, if there are fewer than six creature cards in your graveyard, sacrifice a creature.

Scavenging Ooze

{G}: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on Scavenging Ooze and you gain 1 life.

Reclamation Sage

When Reclamation Sage enters the battlefield, you may destroy target artifact or enchantment.

Evolutionary Leap

{G}, Sacrifice a creature: Reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest on the bottom of your library in a random order.

Green Sun's Zenith

Search your library for a green creature card with converted mana cost X or less, put it onto the battlefield, then shuffle your library. Shuffle Green Sun's Zenith into its owner's library.

Massacre Wurm

When Massacre Wurm enters the battlefield, creatures your opponents control get -2/-2 until end of turn. Whenever a creature an opponent controls is put into a graveyard from the battlefield, that player loses 2 life.

Birthing Pod

({G/P} can be paid with either {G} or 2 life.) {1}{G/P}, {T}, Sacrifice a creature: Search your library for a creature card with converted mana cost equal to 1 plus the sacrificed creature's converted mana cost, put that card onto the battlefield, then shuffle your library. Activate this ability only any time you could cast a sorcery.

Sadistic Hypnotist

Sacrifice a creature: Target player discards two cards from his or her hand. Play this ability only any time you could play a sorcery.

Braids, Cabal Minion

At the beginning of each player's upkeep, that player sacrifices an artifact, creature, or land.

Big Game Hunter

When Big Game Hunter comes into play, destroy target creature with power 4 or greater. It can't be regenerated. Madness {B} (If you discard this card, you may play it for its madness cost instead of putting it into your graveyard.)

Urborg, Tomb of Yawgmoth

Each land is a Swamp in addition to its other land types.

Beast Within

Destroy target permanent. Its controller puts a 3/3 green Beast creature token onto the battlefield.

Diabolic Intent

As an additional cost to play Diabolic Intent, sacrifice a creature. Search your library for a card and put that card into your hand. Then shuffle your library.

Survival of the Fittest

{G}, Discard a creature card: Search your library for a creature card, reveal that card, and put it into your hand. Then shuffle your library.

Maelstrom Pulse

Destroy target nonland permanent and all other permanents with the same name as that permanent.

Dismember

({B/P} can be paid with either {B} or 2 life.) Target creature gets -5/-5 until end of turn.

Elvish Mystic

{T}: Add {G} to your mana pool.

Chord of Calling

Convoke (Each creature you tap while playing this spell reduces its cost by {1} or by one mana of that creature's color.) Search your library for a creature card with converted mana cost X or less and put it into play. Then shuffle your library.

Triskelion

When Triskelion comes into play, put three +1/+1 counters on it. {0}: Remove one of these counters from Triskelion to have Triskelion deal 1 damage to target creature or player.

Abrupt Decay

Abrupt Decay can't be countered by spells or abilities. Destroy target nonland permanent with converted mana cost 3 or less.

Deathrite Shaman

{T}: Exile target land card from a graveyard. Add one mana of any color to your mana pool. {B}, {T}: Exile target instant or sorcery card from a graveyard. Each opponent loses 2 life. {G}, {T}: Exile target creature card from a graveyard. You gain 2 life.

Bloodthrone Vampire

Sacrifice a creature: Bloodthrone Vampire gets +2/+2 until end of turn.

Carrion Feeder

Carrion Feeder can't block. Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

Devoted Druid

{T}: Add {G} to your mana pool. Put a -1/-1 counter on Devoted Druid: Untap Devoted Druid.

Fleshbag Marauder

When Fleshbag Marauder enters the battlefield, each player sacrifices a creature.

Living Death

Set aside all creature cards in all graveyards. Then, put each creature that is in play into its owner's graveyard. Then, put each creature card set aside in this way into play under its owner's control.

Reanimate

Put target creature card from any graveyard into play under your control. Lose life equal to that creature's total casting cost.

Llanowar Wastes

{T}: Add {1} to your mana pool. {T}: Add {B} or {G} to your mana pool. Llanowar Wastes deals 1 damage to you.

Elves of Deep Shadow

{T}: Add {B} to your mana pool, and Elves of Deep Shadow do 1 damage to you. This ability is played as an interrupt.

Bayou

Counts as both swamp and forest and is affected by spells that affect either. Tap to add either {B} or {G} to your mana pool.

Birds of Paradise

Flying {T}: Add one mana of any color to your mana pool. This ability is played as an interrupt.

Llanowar Elves

Tap to add green mana to your mana pool. This tap can be played as an interrupt.

Demonic Tutor

You may search your library for one card and take it into your hand. Reshuffle your library afterwards.

Pattern of Rebirth

When enchanted creature is put into a graveyard from play, that creature's controller may search his or her library for a creature card and put that card into play. If that player does, he or she then shuffles his or her library.

Crop Rotation

At the time you play Crop Rotation, sacrifice a land. Search your library for a land card and put that land into play. Shuffle your library afterwards.

Bone Shredder

Flying; echo (During your next upkeep after this permanent comes into play under your control, pay its casting cost or sacrifice it.) When Bone Shredder comes into play, destroy target nonartifact, nonblack creature.

Phyrexian Tower

{T}: Add one colorless mana to your mana pool. {T}, Sacrifice a creature: Add {B}{B} to your mana pool.

Arbor Elf

{T}: Untap target Forest.

Bojuka Bog

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile all cards from target player's graveyard. {T}: Add {B} to your mana pool.

Lotus Cobra

Landfall — Whenever a land enters the battlefield under your control, you may add one mana of any color to your mana pool.

Bloodstained Mire

Marsh Flats

Misty Rainforest

Overgrown Tomb

Polluted Delta

Verdant Catacombs

Windswept Heath

Wooded Foothills

Smothering Abomination

Acidic Slime

Eternal Witness

Grim Backwoods

Phyrexian Arena

Sakura-Tribe Elder

Shriekmaw

Skullclamp

Solemn Simulacrum

Terastodon

Tectonic Edge

Twilight Mire

Wasteland

Command Tower

{T}: Add one mana of any color in your commander's color identity.

Forest

({T}: Add {G}.)