As Cloud Key enters the battlefield, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less to cast.

{T}: Draw a card. Activate only if you created a token this turn. {8}, {T}, Sacrifice Idol of Oblivion: Create a 10/10 colorless Eldrazi creature token.

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.

{T}: Add {C}. {T}: Target nonland permanent becomes an artifact in addition to its other types until end of turn.

{2}, {T}: Copy target activated or triggered ability you control. You may choose new targets for the copy. {3}, {T}: Copy target instant or sorcery spell you control. You may choose new targets for the copy. {4}, {T}: Copy target permanent spell you control. (The copy becomes a token.)

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}.

Manascape Refractor enters the battlefield tapped. Manascape Refractor has all activated abilities of all lands on the battlefield. You may spend mana as though it were mana of any color to pay the activation costs of Manascape Refractor's abilities.

{T}: Add {U}. {2}{U}: Put an hour counter on Midnight Clock. At the beginning of each upkeep, put an hour counter on Midnight Clock. When the twelfth hour counter is put on Midnight Clock, shuffle your hand and graveyard into your library, then draw seven cards. Exile Midnight Clock.

{2}: Mirage Mirror becomes a copy of target artifact, creature, enchantment, or land until end of turn.

Metalcraft — {T}: Add one mana of any color. Activate only if you control three or more artifacts.

Nyx Lotus enters the battlefield tapped. {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

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

Suspend 3—{1} (Rather than cast this card from your hand, pay {1} and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.) {T}: Add {C}{C}.

When Amphin Mutineer enters the battlefield, exile up to one target non-Salamander creature. That creature's controller creates a 4/3 blue Salamander Warrior creature token. Encore {4}{U}{U} ({4}{U}{U}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

When Archaeomancer enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Heroic — Whenever you cast a spell that targets Artisan of Forms, you may have Artisan of Forms become a copy of target creature, except it has this ability.

When Augur of Bolas enters the battlefield, look at the top three cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

You may have Clever Impersonator enter the battlefield as a copy of any nonland permanent on the battlefield.

Imprint — When Duplicant enters the battlefield, you may exile target nontoken creature. As long as a card exiled with Duplicant is a creature card, Duplicant has the power, toughness, and creature types of the last creature card exiled with Duplicant. It's still a Shapeshifter.

When Elite Arcanist enters the battlefield, you may exile an instant card from your hand. {X}, {T}: Copy the exiled card. You may cast the copy without paying its mana cost. X is the mana value of the exiled card.

Flash When Merfolk Trickster enters the battlefield, tap target creature an opponent controls. It loses all abilities until end of turn.

You may have Sakashima of a Thousand Faces enter the battlefield as a copy of another creature you control, except it has Sakashima of a Thousand Faces's other abilities. The "legend rule" doesn't apply to permanents you control. Partner (You can have two commanders if both have partner.)

When Sea Gate Oracle enters the battlefield, look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Changeling (This card is every creature type.) {2}{U}: Target Shapeshifter becomes a copy of target creature until your next turn.

{1}{U}, Tap two untapped Wizards you control: Copy target instant or sorcery spell. You may choose new targets for the copy.

Flash When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Flying When Sower of Temptation enters the battlefield, gain control of target creature for as long as Sower of Temptation remains on the battlefield.

You may have Spark Double enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1/+1 counter on it if it's a creature, it enters with an additional loyalty counter on it if it's a planeswalker, and it isn't legendary.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Merfolk spells and Wizard spells you cast cost {1} less to cast.

When Thassa's Oracle enters the battlefield, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your library and the rest on the bottom of your library in a random order. If X is greater than or equal to the number of cards in your library, you win the game. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

As True-Name Nemesis enters the battlefield, choose a player. True-Name Nemesis has protection from the chosen player.

Metalcraft — {T}: Tap target artifact, creature, or land. Activate only if you control three or more artifacts.

At the beginning of your upkeep, put a time counter on As Foretold. Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on As Foretold.

Return target permanent to its owner's hand.

Create a token that's a copy of target creature you control. Flashback {5}{U}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.) Return target permanent to its owner's hand.

Target creature gets -4/-0 until end of turn. If you control a Wizard, draw a card.

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.) Choose a counter on target permanent or suspended card. Remove that counter from that permanent or card or put another of those counters on it.

Target creature you control gains protection from creatures your opponents control until end of turn. Untap it.

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.

Replicate {U} (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.) Tap target permanent.

Tap X target nonland permanents.

Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.) Return target nonland permanent to its owner's hand. If this spell was kicked, draw a card.

Buyback {2}{U} (You may pay an additional {2}{U} as you cast this spell. If you do, put this card into your hand as it resolves.) Tap target artifact, creature, or land.

Choose target nonlegendary creature. The next time one or more creatures or planeswalkers enter the battlefield this turn, they enter as copies of the chosen creature. Foretell {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.)

Return target creature you control and target creature you don't control to their owners' hands.

Until end of turn, target creature gains "{T}: Return target nonland permanent to its owner's hand."

Kicker {1} (You may pay an additional {1} as you cast this spell.) Target creature you control gets +0/+3 until end of turn. If this spell was kicked, that creature also gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

You may exile a blue card from your hand rather than pay this spell's mana cost. Return target creature to its owner's hand.

Exile target creature and put two time counters on it. If it doesn't have suspend, it gains suspend. (At the beginning of its owner's upkeep, they remove a time counter. When the last is removed, they may play it without paying its mana cost. If it's a creature, it has haste.)

Exile target permanent you control. Return that card to the battlefield under its owner's control at the beginning of the next end step. If it enters the battlefield as a creature, it enters with an additional +1/+1 counter on it.

Choose one — • Target creature gains flying until end of turn. • Target creature becomes the creature type of your choice until end of turn. • Look at the top four cards of your library, then put them back in any order.

Switch target creature's power and toughness until end of turn. Draw a card.

You may tap or untap target artifact, creature, or land. Draw a card.

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

Cloudpost enters the battlefield tapped. {T}: Add {C} for each Locus on the battlefield.

{T}: Add {C}. {T}, Sacrifice Command Beacon: Put your commander into your hand from the command zone.

Halimar Depths enters the battlefield tapped. When Halimar Depths enters the battlefield, look at the top three cards of your library, then put them back in any order. {T}: Add {U}.

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

{T}: Add {U}. {U}, {T}: Untap target legendary permanent.

({T}: Add {U}.) Mystic Sanctuary enters the battlefield tapped unless you control three or more other Islands. When Mystic Sanctuary enters the battlefield untapped, you may put target instant or sorcery card from your graveyard on top of your library.

{T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

Path of Ancestry enters the battlefield tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

You have no maximum hand size. {T}: Add {C}.

{T}: Add {C}. {1}{U}, {T}: Return target Wizard you control to its owner's hand.

{T}: Add {U}.

({T}: Add {U}.)

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

{T}: Add {C}{C}. Activate only if you control five or more lands.

Put a flood counter on target land. That land is an Island in addition to its other types for as long as it has a flood counter on it. If you control a Merfolk, draw a card.

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.)

Create a token that's a copy of target creature you control. Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

{T}: Add {C}. {1}{U}, {T}: Put target artifact card from your graveyard on top of your library.

Whenever a permanent enters the battlefield tapped and under your control, untap it.

Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.) Return target nonland permanent to its owner's hand. If this spell was kicked, draw a card.

{T}: Add {C}. {T}: Each player gains control of all creatures they own.

You may have Mirrormade enter the battlefield as a copy of any artifact or enchantment on the battlefield.

If a Wizard entering the battlefield under your control causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Flash When Naru Meha, Master Wizard enters the battlefield, copy target instant or sorcery spell you control. You may choose new targets for the copy. Other Wizards you control get +1/+1.

Devoid (This card has no color.) Target creature can't be blocked this turn. Draw a card.

When Spellseeker enters the battlefield, you may search your library for an instant or sorcery card with mana value 2 or less, reveal it, put it into your hand, then shuffle.

Flying At the beginning of your postcombat main phase, there is an additional beginning phase after this phase. (The beginning phase includes the untap, upkeep, and draw steps.)

Target creature gets -4/-0 until end of turn. If you control a Wizard, draw a card.

You have no maximum hand size. {T}: Add {C}.

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

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.)