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.

Flying Artifact spells you cast cost {1} less to cast.

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

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

Devoid (This card has no color.) Colorless spells you cast cost {1} less to cast.

Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for {1}.)

Flying Historic spells you cast cost {1} less to cast. (Artifacts, legendaries, and Sagas are historic.)

{U}, Sacrifice Aether Spellbomb: Return target creature to its owner's hand. {1}, Sacrifice Aether Spellbomb: Draw a card.

When Alchemist's Vial enters the battlefield, draw a card. {1}, {T}, Sacrifice Alchemist's Vial: Target creature can't attack or block this turn.

Flying Whenever you cast a historic spell, scry 1. (Artifacts, legendaries, and Sagas are historic. To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.)

{1}, {T}, Sacrifice Barbed Sextant: Add one mana of any color. Draw a card at the beginning of the next turn's upkeep.

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color. When Chromatic Star is put into a graveyard from the battlefield, draw a card.

Commander creatures you own have "{2}, Sacrifice an artifact: Put a +1/+1 counter on this creature and draw a card."

When Eager Construct enters the battlefield, each player may 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.)

When Elsewhere Flask enters the battlefield, draw a card. Sacrifice Elsewhere Flask: Choose a basic land type. Each land you control becomes that type until end of turn.

Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.) Everflowing Chalice enters the battlefield with a charge counter on it for each time it was kicked. {T}: Add {C} for each charge counter on Everflowing Chalice.

When Guild Globe enters the battlefield, draw a card. {2}, {T}, Sacrifice Guild Globe: Add two mana of different colors.

When Ichor Wellspring enters the battlefield or is put into a graveyard from the battlefield, draw a card.

Flying

When Prophetic Prism enters the battlefield, draw a card. {1}, {T}: Add one mana of any color.

Equipped creature gets +0/+2 and has toxic 1. (Players dealt combat damage by equipped creature also get a poison counter.) Equip {1}

{R}, Sacrifice Pyrite Spellbomb: It deals 2 damage to any target. {1}, Sacrifice Pyrite Spellbomb: Draw a card.

Whenever you cast an artifact spell, you may draw a card. If you do, discard a card.

When Sleeper Dart enters the battlefield, draw a card. {T}, Sacrifice Sleeper Dart: Target creature doesn't untap during its controller's next untap step.

Spare Supplies enters the battlefield tapped. When Spare Supplies enters the battlefield, draw a card. {2}, {T}, Sacrifice Spare Supplies: Draw a card.

{1}, Sacrifice Surgical Skullbomb: Draw a card. {2}{U}, Sacrifice Surgical Skullbomb: Return target creature to its owner's hand. Draw a card. Activate only as a sorcery.

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

({T}: Add {U}.)

Izzet Boilerworks enters the battlefield tapped. When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand. {T}: Add {U}{R}.

({T}: Add {R}.)

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.)

{T}: Add {U}.

Silverbluff Bridge enters the battlefield tapped. Indestructible {T}: Add {U} or {R}.

Temple of Epiphany enters the battlefield tapped. When Temple of Epiphany enters the battlefield, scry 1. {T}: Add {U} or {R}.

{2}, {T}: You gain 5 life. Shuffle Elixir of Immortality and your graveyard into their owner's library.

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.

Counter target noncreature spell.

You have no maximum hand size.

Counter target spell that targets a permanent you control.

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

Coldsteel Heart enters the battlefield tapped. As Coldsteel Heart enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

{T}: Add one mana of any color in your commander's color identity. Sacrifice Commander's Sphere: Draw a card.

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

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

Guardian Idol enters the battlefield tapped. {T}: Add {C}. {2}: Guardian Idol becomes a 2/2 Golem artifact creature until end of turn.

{T}: Add {C}. ({C} represents colorless mana.)

{T}: Add {R}.

{T}: Add one mana of any color. {2}, {T}, Sacrifice Letter of Acceptance: Draw a card.

{T}: Add {C}.

{T}: Add {C}. {1}, {T}, Sacrifice Mind Stone: Draw a card.

Flying {T}: Add one mana of any color.

{T}: Add {C}. {1}, {T}: Add one mana of any color.

Renegade Map enters the battlefield tapped. {T}, Sacrifice Renegade Map: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

{T}: Add {U}.

Sky Diamond enters the battlefield tapped. {T}: Add {U}.

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

Terrarion enters the battlefield tapped. {2}, {T}, Sacrifice Terrarion: Add two mana in any combination of colors. When Terrarion is put into a graveyard from the battlefield, draw a card.

{1}, Sacrifice Wanderer's Twig: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Choose one — • Abrade deals 3 damage to target creature. • Destroy target artifact.

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

Return all nonland permanents with mana value X or less to their owners' hands.

{1}{U}: Return target artifact you control to its owner's hand. {3}, {T}: Copy target artifact spell you control. (The copy becomes a token.)

Return any number of target nonland, nontoken permanents you control to their owners' hands. Draw a card for each card returned to your hand this way.

Return all artifacts to their owners' hands. Cycling {2} ({2}, Discard this card: Draw a card.)

Whenever you cast a noncreature spell, Burning Prophet gets +1/+0 until end of turn, then scry 1.

Grapeshot deals 1 damage to any target. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

This spell costs {X} less to cast, where X is the total mana value of noncreature artifacts you control. Sacrifice two artifacts: Return Metalwork Colossus from your graveyard to your hand.

As Mirrodin Besieged enters the battlefield, choose Mirran or Phyrexian. • Mirran — Whenever you cast an artifact spell, create a 1/1 colorless Myr artifact creature token. • Phyrexian — At the beginning of your end step, draw a card, then discard a card. Then if there are fifteen or more artifact cards in your graveyard, target opponent loses the game.

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life.

Whenever an artifact enters the battlefield under your control, Reckless Fireweaver deals 1 damage to each opponent.

{1}, {T}: Untap another target artifact. {3}, {T}: Target creature can't be blocked this turn.

{1}{U}, Sacrifice Mnemonic Sphere: Draw two cards. Channel — {U}, Discard Mnemonic Sphere: Draw a card.

Living weapon (When this Equipment enters the battlefield, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped creature gets +1/+1 for each artifact and/or enchantment you control. Equip {2}

This spell can't be countered. Flying Whenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target. Whenever a player casts an instant or sorcery spell, you draw a card.

Whenever you cast a noncreature spell, create a 1/1 colorless Servo artifact creature token. −2: Target artifact you control becomes a copy of another target artifact or creature you control until end of turn, except it's an artifact in addition to its other types.

Flash You may cast artifact spells as though they had flash.

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn. Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

Whenever you draw a card, put a +1/+1 counter on Chasm Skulker. When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on Chasm Skulker. (They can't be blocked as long as defending player controls an Island.)

Untap all nonland permanents you control.

Whenever you cast a noncreature spell, Firebrand Archer deals 1 damage to each opponent.

When Golden Egg enters the battlefield, draw a card. {1}, {T}, Sacrifice Golden Egg: Add one mana of any color. {2}, {T}, Sacrifice Golden Egg: You gain 3 life.

Whenever you draw a card, put a +1/+1 counter on Jace's Projection. {3}{U}: Put a loyalty counter on target Jace planeswalker.

Whenever you cast a noncreature spell, Kessig Flamebreather deals 1 damage to each opponent.

Counter target instant or sorcery spell unless its controller pays {3}.

When Mycosynth Wellspring enters the battlefield or is put into a graveyard from the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

When Myr Retriever dies, return another target artifact card from your graveyard to your hand.

Whenever you draw a card, put a foreshadow counter on Ominous Seas. Remove eight foreshadow counters from Ominous Seas: Create an 8/8 blue Kraken creature token. Cycling {2} ({2}, Discard this card: Draw a card.)

Flying Whenever you draw a card, put a +1/+1 counter on Oneirophage.

{T}: Exile the bottom card of target player's graveyard. {1}, Sacrifice Phyrexian Furnace: Exile target card from a graveyard. Draw a card.

Whenever an artifact enters the battlefield under your control, you may discard a card. If you do, draw a card.

Return all artifacts you control to their owner's hand.

Whenever an artifact enters the battlefield under your control, Salivating Gremlins gets +2/+0 and gains trample until end of turn.