Gaea's Avenger

Gaea's Avenger's power and toughness are each equal to 1 plus the number of artifacts your opponents control.

Plains

Seasinger

When you control no Islands, sacrifice Seasinger.
You may choose not to untap Seasinger during your untap step.
{T}: Gain control of target creature whose controller controls an Island for as long as you control Seasinger and Seasinger remains tapped.

Power Artifact

Enchant artifact
Enchanted artifact's activated abilities cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Sylvan Library

At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.

Mana Drain

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

Gosta Dirk

First strike
Creatures with islandwalk can be blocked as though they didn't have islandwalk.

Old Man of the Sea

You may choose not to untap Old Man of the Sea during your untap step.
{T}: Gain control of target creature with power less than or equal to Old Man of the Sea's power for as long as Old Man of the Sea remains tapped and that creature's power remains less than or equal to Old Man of the Sea's power.

Land Tax

At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.

Pendelhaven

{T}: Add {G}.
{T}: Target 1/1 creature gets +1/+2 until end of turn.

Gauntlets of Chaos

{5}, Sacrifice Gauntlets of Chaos: Exchange control of target artifact, creature, or land you control and target permanent an opponent controls that shares one of those types with it. If those permanents are exchanged this way, destroy all Auras attached to them.

Berserk

Cast this spell only before the combat damage step.
Target creature gains trample and gets +X/+0 until end of turn, where X is its power. At the beginning of the next end step, destroy that creature if it attacked this turn.

Wild Growth

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional {G}.

Rasputin Dreamweaver

Rasputin Dreamweaver enters with seven dream counters on it.
Remove a dream counter from Rasputin: Add {C}.
Remove a dream counter from Rasputin: Prevent the next 1 damage that would be dealt to Rasputin this turn.
At the beginning of your upkeep, if Rasputin started the turn untapped, put a dream counter on it.
Rasputin can't have more than seven dream counters on it.

Forest

Powerleech

Whenever an artifact an opponent controls becomes tapped or an opponent activates an artifact's ability without {T} in its activation cost, you gain 1 life.

Sand Silos

Sand Silos enters tapped.
You may choose not to untap Sand Silos during your untap step.
At the beginning of your upkeep, if Sand Silos is tapped, put a storage counter on it.
{T}, Remove any number of storage counters from Sand Silos: Add {U} for each storage counter removed this way.

Spell Blast

Counter target spell with mana value X. (For example, if that spell's mana cost is {3}{U}{U}, X is 5.)

Brainwash

Enchant creature
Enchanted creature can't attack unless its controller pays {3}.

Control Magic

Enchant creature
You control enchanted creature.

Concordant Crossroads

Island

Mahamoti Djinn

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

Diamond Valley

{T}, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness.

Icatian Store

Icatian Store enters tapped.
You may choose not to untap Icatian Store during your untap step.
At the beginning of your upkeep, if Icatian Store is tapped, put a storage counter on it.
{T}, Remove any number of storage counters from Icatian Store: Add {W} for each storage counter removed this way.

Giant Growth

Target creature gets +3/+3 until end of turn.

Counterspell

Nevinyrral's Disk

Nevinyrral's Disk enters tapped.
{1}, {T}: Destroy all artifacts, creatures, and enchantments.

Svyelunite Temple

Svyelunite Temple enters tapped.
{T}: Add {U}.
{T}, Sacrifice Svyelunite Temple: Add {U}{U}.

Willow Satyr

You may choose not to untap Willow Satyr during your untap step.
{T}: Gain control of target legendary creature for as long as you control Willow Satyr and Willow Satyr remains tapped.

Tolaria

{T}: Add {U}.
{T}: Target creature loses banding and all "bands with other" abilities until end of turn. Activate only during any upkeep step.

Vesuvan Doppelganger

You may have Vesuvan Doppelganger enter as a copy of any creature on the battlefield, except it doesn't copy that creature's color and it has "At the beginning of your upkeep, you may have this creature become a copy of target creature, except it doesn't copy that creature's color and it has this ability."

Preacher

You may choose not to untap Preacher during your untap step.
{T}: For as long as Preacher remains tapped, gain control of target creature of an opponent's choice they control.

Scarwood Bandits

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)
{2}{G}, {T}: Unless an opponent pays {2}, gain control of target artifact for as long as Scarwood Bandits remains on the battlefield.

Disenchant

Tundra

Spirit Link

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Whenever enchanted creature deals damage, you gain that much life.

Sol Ring

Savannah

Timetwister

Each player shuffles their hand and graveyard into their library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)

Citanul Druid

Whenever an opponent casts an artifact spell, put a +1/+1 counter on Citanul Druid.

Rubinia Soulsinger

You may choose not to untap Rubinia Soulsinger during your untap step.
{T}: Gain control of target creature for as long as you control Rubinia and Rubinia remains tapped.

Desert Twister

Karma

At the beginning of each player's upkeep, Karma deals damage to that player equal to the number of Swamps they control.

Ruins of Trokair

Ruins of Trokair enters tapped.
{T}: Add {W}.
{T}, Sacrifice Ruins of Trokair: Add {W}{W}.

Northern Paladin

{W}{W}, {T}: Destroy target black permanent.

Havenwood Battleground

Havenwood Battleground enters tapped.
{T}: Add {G}.
{T}, Sacrifice Havenwood Battleground: Add {G}{G}.

Tormod's Crypt

{T}, Sacrifice Tormod's Crypt: Exile target player's graveyard.

Arcades Sabboth

Flying
At the beginning of your upkeep, sacrifice Arcades Sabboth unless you pay {G}{W}{U}.
Each untapped creature you control gets +0/+2 as long as it's not attacking.
{W}: Arcades Sabboth gets +0/+1 until end of turn.

Maze of Ith

{T}: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

Lure

Enchant creature
All creatures able to block enchanted creature do so.

Divine Offering

Destroy target artifact. You gain life equal to its mana value.

Feldon's Cane

{T}, Exile Feldon's Cane: Shuffle your graveyard into your library.

Ring of Renewal

{5}, {T}: Discard a card at random, then draw two cards.

Unsummon

Return target creature to its owner's hand.

Elven Riders

Elven Riders can't be blocked except by Walls and/or creatures with flying.

Steal Artifact

Enchant artifact
You control enchanted artifact.

Rocket Launcher

{2}: Rocket Launcher deals 1 damage to any target. Destroy Rocket Launcher at the beginning of the next end step. Activate only if you've controlled Rocket Launcher continuously since the beginning of your most recent turn.

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

Fellwar Stone

{T}: Add one mana of any color that a land an opponent controls could produce.

Thunder Spirit

Serra Angel

Juxtapose

You and target player exchange control of the creature you each control with the highest mana value. Then exchange control of artifacts the same way. If two or more permanents a player controls are tied for highest, their controller chooses one of them.

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Dust to Dust

Lifeblood

Whenever a Mountain an opponent controls becomes tapped, you gain 1 life.

Basalt Monolith

Basalt Monolith doesn't untap during your untap step.
{T}: Add {C}{C}{C}.
{3}: Untap Basalt Monolith.

Mirror Universe

{T}, Sacrifice Mirror Universe: Exchange life totals with target opponent. Activate only during your upkeep.

Llanowar Elves

Exorcist

{1}{W}, {T}: Destroy target black creature.

Wrath of God

Destroy all creatures. They can't be regenerated.

Mana Vault

Mana Vault doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault.
At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.
{T}: Add {C}{C}{C}.

Clone

You may have Clone enter as a copy of any creature on the battlefield.

Hurricane

Hurricane deals X damage to each creature with flying and each player.

Prevent all combat damage that would be dealt this turn.

Strip Mine

{T}: Add {C}.
{T}, Sacrifice Strip Mine: Destroy target land.

Sword of the Ages

Sword of the Ages enters tapped.
{T}, Sacrifice Sword of the Ages and any number of creatures you control: Sword of the Ages deals X damage to any target, where X is the total power of the creatures sacrificed this way, then exile Sword of the Ages and those creature cards.

Birds of Paradise

Whirling Dervish

Protection from black
At the beginning of each end step, if Whirling Dervish dealt damage to an opponent this turn, put a +1/+1 counter on it.

Braingeyser

Hollow Trees

Hollow Trees enters tapped.
You may choose not to untap Hollow Trees during your untap step.
At the beginning of your upkeep, if Hollow Trees is tapped, put a storage counter on it.
{T}, Remove any number of storage counters from Hollow Trees: Add {G} for each storage counter removed this way.