Library of Leng

You have no maximum hand size.
If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.

Heart of Yavimaya

If Heart of Yavimaya would enter the battlefield, sacrifice a Forest instead. If you do, put Heart of Yavimaya onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add {G}.
{T}: Target creature gets +1/+1 until end of turn.

Ogre Arsonist

When Ogre Arsonist enters the battlefield, destroy target land.

Bash to Bits

Destroy target artifact.
Flashback {4}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Squee, Goblin Nabob

At the beginning of your upkeep, you may return Squee, Goblin Nabob from your graveyard to your hand.

Krosan Beast

Threshold — Krosan Beast gets +7/+7 as long as seven or more cards are in your graveyard.

Crashing Centaur

{G}, Discard a card: Crashing Centaur gains trample until end of turn.
Threshold — As long as seven or more cards are in your graveyard, Crashing Centaur gets +2/+2 and has shroud. (It can't be the target of spells or abilities.)

Nature's Resurgence

Each player draws a card for each creature card in their graveyard.

Treetop Village

Treetop Village enters the battlefield tapped.
{T}: Add {G}.
{1}{G}: Treetop Village becomes a 3/3 green Ape creature with trample until end of turn. It's still a land. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Moss Diamond

Moss Diamond enters the battlefield tapped.
{T}: Add {G}.

Avatar of Fury

If an opponent controls seven or more lands, this spell costs {6} less to cast.
Flying
{R}: Avatar of Fury gets +1/+0 until end of turn.

Regrowth

Return target card from your graveyard to your hand.

Grizzly Fate

Create two 2/2 green Bear creature tokens.
Threshold — Create four 2/2 green Bear creature tokens instead if seven or more cards are in your graveyard.
Flashback {5}{G}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Corrupt Eunuchs

When Corrupt Eunuchs enters the battlefield, it deals 2 damage to target creature.

Elephant Resurgence

Each player creates a green Elephant creature token. Those creatures have "This creature's power and toughness are each equal to the number of creature cards in its controller's graveyard."

Fallow Wurm

When Fallow Wurm enters the battlefield, sacrifice it unless you discard a land card.

Fierce Empath

When Fierce Empath enters the battlefield, you may search your library for a creature card with mana value 6 or greater, reveal it, put it into your hand, then shuffle.

Gigapede

Shroud (This creature can't be the target of spells or abilities.)
At the beginning of your upkeep, if Gigapede is in your graveyard, you may discard a card. If you do, return Gigapede to your hand.

Salvage

Put target card from your graveyard on top of your library.

Recoup

Target sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (Mana cost includes color.)
Flashback {3}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Forgotten Harvest

At the beginning of your upkeep, you may exile a land card from your graveyard. If you do, put a +1/+1 counter on target creature.

Narcissism

{G}, Discard a card: Target creature gets +2/+2 until end of turn.
{G}, Sacrifice Narcissism: Target creature gets +2/+2 until end of turn.

Ghitu Encampment

Ghitu Encampment enters the battlefield tapped.
{T}: Add {R}.
{1}{R}: Ghitu Encampment becomes a 2/1 red Warrior creature with first strike until end of turn. It's still a land. (It deals combat damage before creatures without first strike.)

Flametongue Kavu

When Flametongue Kavu enters the battlefield, it deals 4 damage to target creature.

Fire Imp

When Fire Imp enters the battlefield, it deals 2 damage to target creature.

Arrogant Wurm

Trample
Madness {2}{G} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Hammer of Bogardan

Hammer of Bogardan deals 3 damage to any target.
{2}{R}{R}{R}: Return Hammer of Bogardan from your graveyard to your hand. Activate only during your upkeep.

Basking Rootwalla

{1}{G}: Basking Rootwalla gets +2/+2 until end of turn. Activate only once each turn.
Madness {0} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Uktabi Orangutan

When Uktabi Orangutan enters the battlefield, destroy target artifact.

Harvest Wurm

When Harvest Wurm enters the battlefield, sacrifice it unless you return a basic land card from your graveyard to your hand.

Wild Mongrel

Discard a card: Wild Mongrel gets +1/+1 and becomes the color of your choice until end of turn.

Diligent Farmhand

{1}{G}, Sacrifice Diligent Farmhand: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
If Diligent Farmhand is in a graveyard, effects from spells named Muscle Burst count it as a card named Muscle Burst.

Karplusan Forest

{T}: Add {C}.
{T}: Add {R} or {G}. Karplusan Forest deals 1 damage to you.

Chlorophant

At the beginning of your upkeep, you may put a +1/+1 counter on Chlorophant.
Threshold — As long as seven or more cards are in your graveyard, Chlorophant has "At the beginning of your upkeep, you may put another +1/+1 counter on Chlorophant."

Weatherseed Treefolk

Trample
When Weatherseed Treefolk dies, return it to its owner's hand.

Horned Kavu

When Horned Kavu enters the battlefield, return a red or green creature you control to its owner's hand.

Hammerheim

{T}: Add {R}.
{T}: Target creature loses all landwalk abilities until end of turn.

Karplusan Yeti

{T}: Karplusan Yeti deals damage equal to its power to target creature. That creature deals damage equal to its power to Karplusan Yeti.

Tranquil Thicket

Tranquil Thicket enters the battlefield tapped.
{T}: Add {G}.
Cycling {G} ({G}, Discard this card: Draw a card.)

Slate of Ancestry

{4}, {T}, Discard your hand: Draw a card for each creature you control.

Primitive Etchings

Reveal the first card you draw each turn. Whenever you reveal a creature card this way, draw a card.

Balduvian Hydra

Balduvian Hydra enters the battlefield with X +1/+0 counters on it.
Remove a +1/+0 counter from Balduvian Hydra: Prevent the next 1 damage that would be dealt to Balduvian Hydra this turn.
{R}{R}{R}: Put a +1/+0 counter on Balduvian Hydra. Activate only during your upkeep.

Groundskeeper

{1}{G}: Return target basic land card from your graveyard to your hand.

Jungle Basin

Jungle Basin enters the battlefield tapped.
When Jungle Basin enters the battlefield, sacrifice it unless you return an untapped Forest you control to its owner's hand.
{T}: Add {C}{G}.

Book of Rass

Gurzigost

At the beginning of your upkeep, sacrifice Gurzigost unless you put two cards from your graveyard on the bottom of your library.
{G}{G}, Discard a card: You may have Gurzigost assign its combat damage this turn as though it weren't blocked.

Overrun

Creatures you control get +3/+3 and gain trample until end of turn.

Mountain Valley

Mountain Valley enters the battlefield tapped.
{T}, Sacrifice Mountain Valley: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.

Blasted Landscape

{T}: Add {C}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Fledgling Dragon

Flying
Threshold — As long as seven or more cards are in your graveyard, Fledgling Dragon gets +3/+3 and has "{R}: Fledgling Dragon gets +1/+0 until end of turn."

Verduran Emissary

Kicker {1}{R} (You may pay an additional {1}{R} as you cast this spell.)
When Verduran Emissary enters the battlefield, if it was kicked, destroy target artifact. It can't be regenerated.

Krosan Tusker

Cycling {2}{G} ({2}{G}, Discard this card: Draw a card.)
When you cycle Krosan Tusker, you may search your library for a basic land card, reveal that card, put it into your hand, then shuffle. (Do this before you draw.)

Far Wanderings

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
Threshold — If seven or more cards are in your graveyard, instead search your library for up to three basic land cards, put them onto the battlefield tapped, then shuffle.

Krosan Restorer

{T}: Untap target land.
Threshold — {T}: Untap up to three target lands. Activate only if seven or more cards are in your graveyard.

Tuknir Deathlock

Flying
{R}{G}, {T}: Target creature gets +2/+2 until end of turn.

Dawnstrider

{G}, {T}, Discard a card: Prevent all combat damage that would be dealt this turn.

Multani's Acolyte

Echo {G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Multani's Acolyte enters the battlefield, draw a card.

Temporary Insanity

Untap target creature with power less than the number of cards in your graveyard and gain control of it until end of turn. That creature gains haste until end of turn.

Quirion Elves

As Quirion Elves enters the battlefield, choose a color.
{T}: Add {G}.
{T}: Add one mana of the chosen color.

Pardic Arsonist

Threshold — As long as seven or more cards are in your graveyard, Pardic Arsonist has "When Pardic Arsonist enters the battlefield, it deals 3 damage to any target."

Hammer Mage

{X}{R}, {T}, Discard a card: Destroy all artifacts with mana value X or less.

Fervor

Creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Crush of Wurms

Create three 6/6 green Wurm creature tokens.
Flashback {9}{G}{G}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Dormant Volcano

Dormant Volcano enters the battlefield tapped.
When Dormant Volcano enters the battlefield, sacrifice it unless you return an untapped Mountain you control to its owner's hand.
{T}: Add {C}{R}.

Wood Elves

When Wood Elves enters the battlefield, search your library for a Forest card, put that card onto the battlefield, then shuffle.

Hermit Druid

{G}, {T}: Reveal cards from the top of your library until you reveal a basic land card. Put that card into your hand and all other cards revealed this way into your graveyard.

Thawing Glaciers

Thawing Glaciers enters the battlefield tapped.
{1}, {T}: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. Return Thawing Glaciers to its owner's hand at the beginning of the next cleanup step.

Balduvian Horde

When Balduvian Horde enters the battlefield, sacrifice it unless you discard a card at random.

Cartographer

When Cartographer enters the battlefield, you may return target land card from your graveyard to your hand.

Forest

Overwhelming Instinct

Whenever you attack with three or more creatures, draw a card.

Grafted Skullcap

At the beginning of your draw step, draw an additional card.
At the beginning of your end step, discard your hand.

Slippery Karst

Slippery Karst enters the battlefield tapped.
{T}: Add {G}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Concordant Crossroads

Kavu Climber

When Kavu Climber enters the battlefield, draw a card.

Collective Unconscious

Draw a card for each creature you control.

Centaur Chieftain

Haste
Threshold — As long as seven or more cards are in your graveyard, Centaur Chieftain has "When Centaur Chieftain enters the battlefield, creatures you control get +1/+1 and gain trample until end of turn."

Utopia Tree

Terminal Moraine

{T}: Add {C}.
{2}, {T}, Sacrifice Terminal Moraine: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Primal Rage

Creatures you control have trample. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)

Nantuko Cultivator

When Nantuko Cultivator enters the battlefield, you may discard any number of land cards. Put that many +1/+1 counters on Nantuko Cultivator and draw that many cards.

Shivan Wurm

Trample
When Shivan Wurm enters the battlefield, return a red or green creature you control to its owner's hand.

Fire Diamond

Fire Diamond enters the battlefield tapped.
{T}: Add {R}.

Pyknite

When Pyknite enters the battlefield, draw a card at the beginning of the next turn's upkeep.

Whiteout

All creatures lose flying until end of turn.
Sacrifice a snow land: Return Whiteout from your graveyard to your hand.

Sol Grail

As Sol Grail enters the battlefield, choose a color.
{T}: Add one mana of the chosen color.

Yavimaya Elder

When Yavimaya Elder dies, you may search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.
{2}, Sacrifice Yavimaya Elder: Draw a card.

Balduvian Trading Post

If Balduvian Trading Post would enter the battlefield, sacrifice an untapped Mountain instead. If you do, put Balduvian Trading Post onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add {C}{R}.
{1}, {T}: Balduvian Trading Post deals 1 damage to target attacking creature.

Ravenous Baboons

When Ravenous Baboons enters the battlefield, destroy target nonbasic land.

Shard Phoenix

Flying (This creature can't be blocked except by creatures with flying or reach.)
Sacrifice Shard Phoenix: It deals 2 damage to each creature without flying.
{R}{R}{R}: Return Shard Phoenix from your graveyard to your hand. Activate only during your upkeep.

Minotaur Explorer

When Minotaur Explorer enters the battlefield, sacrifice it unless you discard a card at random.

Terravore

Trample
Terravore's power and toughness are each equal to the number of land cards in all graveyards.

Contested Cliffs

{T}: Add {C}.
{R}{G}, {T}: Target Beast creature you control fights target creature an opponent controls. (Each deals damage equal to its power to the other.)

Forgotten Cave

Forgotten Cave enters the battlefield tapped.
{T}: Add {R}.
Cycling {R} ({R}, Discard this card: Draw a card.)

Smoldering Crater

Smoldering Crater enters the battlefield tapped.
{T}: Add {R}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Dragon Breath

Enchant creature
Enchanted creature has haste.
{R}: Enchanted creature gets +1/+0 until end of turn.
When a creature with mana value 6 or greater enters the battlefield, you may return Dragon Breath from your graveyard to the battlefield attached to that creature.

Quirion Trailblazer

When Quirion Trailblazer enters the battlefield, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Shivan Oasis

Shivan Oasis enters the battlefield tapped.
{T}: Add {R} or {G}.

Exoskeletal Armor

Enchant creature
Enchanted creature gets +X/+X, where X is the number of creature cards in all graveyards.

Pitchstone Wall

Defender (This creature can't attack.)
Whenever you discard a card, you may sacrifice Pitchstone Wall. If you do, return the discarded card from your graveyard to your hand.

Werebear

{T}: Add {G}.
Threshold — Werebear gets +3/+3 as long as seven or more cards are in your graveyard.

Mountain

Mossfire Valley

Sparkcaster

When Sparkcaster enters the battlefield, return a red or green creature you control to its owner's hand.
When Sparkcaster enters the battlefield, it deals 1 damage to target player or planeswalker.