At the beginning of your end step, you may exile target creature you control, then return that card to the battlefield under your control.

Avoidance — Whenever you cast a noncreature spell, exile up to one target nonland permanent you control, then return that card to the battlefield under its owner's control.

Change the text of target spell or permanent by replacing all instances of one color word with another. (This effect lasts indefinitely.) Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

You may have Estrid's Invocation enter the battlefield as a copy of an enchantment you control, except it has "At the beginning of your upkeep, you may exile this enchantment. If you do, return it to the battlefield under its owner's control."

Change the text of target spell or permanent by replacing all instances of one color word with another. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Imprint — When Isochron Scepter enters the battlefield, you may exile an instant card with mana value 2 or less from your hand. {2}, {T}: You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.

You may have Masterwork of Ingenuity enter the battlefield as a copy of any Equipment on the battlefield.

Imprint — When Prototype Portal enters the battlefield, you may exile an artifact card from your hand. {X}, {T}: Create a token that's a copy of the exiled card. X is the mana value of that card.

You may have Sculpting Steel enter the battlefield as a copy of any artifact on the battlefield.

Imprint — When Spellbinder enters the battlefield, you may exile an instant card from your hand. Whenever equipped creature deals combat damage to a player, you may copy the exiled card. If you do, you may cast the copy without paying its mana cost. Equip {4}

Vigilance (Attacking doesn't cause this creature to tap.) As Diamond Knight enters the battlefield, choose a color. Whenever you cast a spell of the chosen color, put a +1/+1 counter on Diamond Knight.

{1}{U}: Target spell or permanent becomes the color of your choice until end of turn.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) When Blistergrub dies, each opponent loses 2 life.

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

As Chameleon Spirit enters the battlefield, choose a color. Chameleon Spirit's power and toughness are each equal to the number of permanents of the chosen color your opponents control.

Flying Metathran Transport can't be blocked by blue creatures. {U}: Target creature becomes blue until end of turn.

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.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) Whenever Odylic Wraith deals damage to a player, that player discards a card.

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

{3}{B}, {T}: Target creature gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.) {1}{B}: Regenerate Restless Bones.

As long as it's your turn and you control four or more Mountains, Sardian Cliffstomper gets +X/+0, where X is the number of Mountains you control.

{T}: Target land becomes the basic land type of your choice until end of turn.

Squelching Leeches's power and toughness are each equal to the number of Swamps you control.

{1}: Choose a basic land type. Each land you control becomes that type until end of turn.

Whenever you gain life, target opponent loses that much life.

Target creature becomes red and gains haste until end of turn. Draw a card.

Draw a card. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Target creature gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.) Draw a card.

Any number of target creatures become the color of your choice until end of turn. Draw a card.

As Circle of Affliction enters the battlefield, choose a color. Whenever a source of the chosen color deals damage to you, you may pay {1}. If you do, target player loses 1 life and you gain 1 life.

Enchant land Enchanted land is a Swamp. Whenever enchanted land becomes tapped, its controller loses 2 life.

Enchant land As Convincing Mirage enters the battlefield, choose a basic land type. Enchanted land is the chosen type.

As Curse of Wizardry enters the battlefield, choose a color. Whenever a player casts a spell of the chosen color, that player loses 1 life.

Enchant land Enchanted land is a Swamp.

Enchant land As Phantasmal Terrain enters the battlefield, choose a basic land type. Enchanted land is the chosen type.

As Shifting Sky enters the battlefield, choose a color. All nonland permanents are the chosen color.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) As long as Filth is in your graveyard and you control a Swamp, creatures you control have swampwalk.

{T}: Target land becomes the basic land type of your choice until end of turn.

Enchant creature As Traveler's Cloak enters the battlefield, choose a land type. When Traveler's Cloak enters the battlefield, draw a card. Enchanted creature has landwalk of the chosen type. (It can't be blocked as long as defending player controls a land of that type.)

Enchant creature Enchanted creature gets +2/+2 and has mountainwalk. (It can't be blocked as long as defending player controls a Mountain.)

Change the text of target spell or permanent by replacing all instances of one color word with another or one basic land type with another until end of turn. Draw a card.

Target spell or permanent becomes black. (Mana symbols on that permanent remain unchanged.)

Change the text of target spell or permanent by replacing all instances of one basic land type with another. (For example, you may change "swampwalk" to "plainswalk." This effect lasts indefinitely.)

Change the text of target spell or permanent by replacing all instances of one color word with another. (For example, you may change "target black spell" to "target blue spell." This effect lasts indefinitely.)

{2}, {T}: Add {B} for each Swamp you control.

As Diamond Mare enters the battlefield, choose a color. Whenever you cast a spell of the chosen color, you gain 1 life.

As Prism Ring enters the battlefield, choose a color. Whenever you cast a spell of the chosen color, you gain 1 life.

Whenever you cast a black spell or a Swamp enters the battlefield under your control, you gain 1 life.

Equipped creature gets +3/+3 and has protection from each color that's not in your commander's color identity. Equip commander {3} Equip {5}

Indestructible Equipped creature has indestructible. Equip {2}

Flash Indestructible When Mithril Coat enters the battlefield, attach it to target legendary creature you control. Equipped creature has indestructible. Equip {3}

Equipped creature gets +1/+1 for each land you control. Equip legendary creature {3} Equip {7}

You may sacrifice a Mountain rather than pay this spell's mana cost. Target creature gets +X/+0 until end of turn, where X is the number of Mountains you control.

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

Lands you control have "{T}: Add one mana of any color." {T}: Add one mana of any color.

You may tap or untap target permanent, then you may tap or untap another target permanent. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Black spells you cast cost {1} less to cast.

Target land becomes the basic land type of your choice until end of turn. Draw a card at the beginning of the next turn's upkeep.

Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another. (For example, you may change "nonblack creature" to "nongreen creature" or "forestwalk" to "islandwalk." This effect lasts indefinitely.)

Blue spells and red spells you cast cost {1} less to cast. {1}{B}: Regenerate Nightscape Familiar.

As Paradise Plume enters the battlefield, choose a color. Whenever a player casts a spell of the chosen color, you may gain 1 life. {T}: Add one mana of the chosen color.

As Realmwright enters the battlefield, choose a basic land type. Lands you control are the chosen type in addition to their other types.

Target land becomes the basic land type of your choice until end of turn. Draw a card.

{T}: Add {C}{C}.

Equipped creature gets +2/+2 and has protection from red and from green. Whenever equipped creature deals combat damage to a player, exile the top two cards of your library. You may play those cards this turn. You may play an additional land this turn. Equip {2}

Return X target creature cards from your graveyard to your hand.

Return target creature card from your graveyard to your hand. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Defender When Mnemonic Wall enters the battlefield, you may return target instant or sorcery card from your graveyard to your hand.

Return target creature card from your graveyard to your hand. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Menace Whenever you gain life, you may pay {B}. If you do, return target creature card from your graveyard to your hand.

Corrupt deals damage to any target equal to the number of Swamps you control. You gain life equal to the damage dealt this way.

Target creature gets -1/-1 until end of turn for each Swamp you control.

As an additional cost to cast this spell, pay X life. Fire Covenant deals X damage divided as you choose among any number of target creatures.

Choose two — • Return target creature card from your graveyard to your hand. • Target player discards a card. • Destroy target artifact. • Kolaghan's Command deals 2 damage to any target.

All creatures get -1/-1 until end of turn for each Swamp you control.

Enchant creature Enchanted creature gets -1/-1 for each Swamp you control.

Seismic Strike deals damage to target creature equal to the number of Mountains you control.

Choose one or both — • Counter target creature spell. • Return target creature card from your graveyard to your hand.

Flying When Spawn of Thraxes enters the battlefield, it deals damage to any target equal to the number of Mountains you control.

Return each creature your opponents control with toughness X or less to its owner's hand, where X is the number of Islands you control. Foretell {1}{U}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Spire Barrage deals damage to any target equal to the number of Mountains you control.

Spitting Earth deals damage to target creature equal to the number of Mountains you control.

Choose a color. Sudden Demise deals X damage to each creature of the chosen color.

Tendrils of Corruption deals X damage to target creature and you gain X life, where X is the number of Swamps you control.

As an additional cost to cast this spell, pay X life. All creatures get -X/-X until end of turn.

Target player discards a card. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Search target player's library for up to X cards, where X is the number of Swamps you control, and exile them. Then that player shuffles.

Create a 1/1 blue and black Horror creature token with flying. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Imprint — {X}, {T}: You may exile an instant or sorcery card with mana value X from your hand. At the beginning of your upkeep, you may copy a card exiled with Panoptic Mirror. If you do, you may cast the copy without paying its mana cost.

Rockslide Ambush deals damage to target creature equal to the number of Mountains you control.

As Swirl the Mists enters the battlefield, choose a color word. All instances of color words in the text of spells and permanents are changed to the chosen color word.

Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another until end of turn. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)