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.

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

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) Artifact creature spells you cast have affinity for artifacts. (They cost {1} less to cast for each artifact you control.)

When Perilous Myr dies, it deals 2 damage to any target.

Whenever a nontoken artifact is put into your graveyard from the battlefield, return that card to your hand unless target opponent has Pia's Revolution deal 3 damage to them.

Indestructible As long as your devotion to red is less than five, Purphoros isn't a creature. Whenever another creature enters the battlefield under your control, Purphoros deals 2 damage to each opponent. {2}{R}: Creatures you control get +1/+0 until end of turn.

When Cathodion dies, add {C}{C}{C}.

When Myr Battlesphere enters the battlefield, create four 1/1 colorless Myr artifact creature tokens. Whenever Myr Battlesphere attacks, you may tap X untapped Myr you control. If you do, Myr Battlesphere gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.

When Goblin Engineer enters the battlefield, you may search your library for an artifact card, put it into your graveyard, then shuffle. {R}, {T}, Sacrifice an artifact: Return target artifact card with mana value 3 or less from your graveyard to the battlefield.

{T}: Choose target artifact a player controls and target artifact card in that player's graveyard. If both targets are still legal as this ability resolves, that player simultaneously sacrifices the artifact and returns the artifact card to the battlefield.

Flying When Junk Diver dies, return another target artifact card from your graveyard to your hand.

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

Sacrifice Salvager of Ruin: Choose target permanent card in your graveyard that was put there from the battlefield this turn. Return it to your hand.

{1}, Sacrifice a Scarecrow: Draw a card. {4}, {T}: Return target artifact creature card from your graveyard to the battlefield.

When Coveted Jewel enters the battlefield, draw three cards. {T}: Add three mana of any one color. Whenever one or more creatures an opponent controls attack you and aren't blocked, that player draws three cards and gains control of Coveted Jewel. Untap it.

Draft Deal Broker face up. Immediately after the draft, you may reveal a card in your card pool. Each other player may offer you one card in their card pool in exchange. You may accept any one offer. {T}: Draw a card, then discard a card.

{2}, {T}: Draw a card. Activate only if you control three or more lands with the same name.

Draw two cards, then discard two cards. Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

You may look at the top card of your library any time. You may cast artifact spells and colorless spells from the top of your library. {T}, Pay 1 life: Exile the top card of your library.

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

Improvise (Each artifact you tap after you're done activating mana abilities pays for {1}.) Reveal the top X cards of your library. You may put any number of artifact cards with mana value X or less from among them onto the battlefield. Then put all cards revealed this way that weren't put onto the battlefield into your graveyard.

Flying When Sandstone Oracle enters the battlefield, choose an opponent. If that player has more cards in hand than you, draw cards equal to the difference.

{1}, {T}: Exile any number of cards from your hand face down. Put that many cards from the top of your library into your hand. Then look at the exiled cards and put them on top of your library in any order.

{1}: Look at the top three cards of your library, then put them back in any order. {T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

Equipped creature gets +1/-1. Whenever equipped creature dies, draw two cards. Equip {1}

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.

{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.

{T}: Target player mills a card. (They put the top card of their library into their graveyard.) {5}, {T}, Sacrifice Codex Shredder: Return target card from your graveyard to your hand.

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.

{R}, Sacrifice Implement of Combustion: It deals 1 damage to target player or planeswalker. When Implement of Combustion is put into a graveyard from the battlefield, draw a card.

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

{T}: Add {C}{C}. Ancient Tomb deals 2 damage to you.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) {T}: Add {C}. {5}, {T}: Draw a card. Activate only if you have the city's blessing.

{T}: Add {C}. {2}, {T}, Sacrifice Buried Ruin: Return target artifact card from your graveyard to your hand.

Indestructible {T}: Add {C}.

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

{T}: Add {C}. {2}, {T}: Each player draws a card, then discards a card.

{T}: Add {R}.

At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life. {T}: Add {C}. {4}, {T}, Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.

{T}: Add {C}. {1}{R}, {T}: Create a 0/1 red Kobold creature token named Kobolds of Kher Keep.

({T}: Add {R}.) Madblind Mountain enters the battlefield tapped. {R}, {T}: Shuffle your library. Activate only if you control two or more red permanents.

({T}: Add {R}.)

{T}: Add {C}. {1}, {T}, Sacrifice an artifact: You gain 1 life.

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

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

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

Sacrifice a creature: Add {C}{C}.

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, put it into your hand, then shuffle.

{T}: Add {C}{C}. {2}, {T}, Sacrifice Hedron Archive: Draw two cards.

Sacrifice an artifact: Add {C}{C}.

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

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

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

When Solemn Simulacrum enters the battlefield, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. When Solemn Simulacrum dies, you may draw a card.

+2: Discard up to two cards, then draw that many cards. −2: Sacrifice an artifact. If you do, return target artifact card from your graveyard to the battlefield. −10: You get an emblem with "Whenever an artifact is put into your graveyard from the battlefield, return that card to the battlefield at the beginning of the next end step." Daretti, Scrap Savant can be your commander.

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 Meteor Golem enters the battlefield, destroy target nonland permanent an opponent controls.

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

{T}, Sacrifice a creature: Blasting Station deals 1 damage to any target. Whenever a creature enters the battlefield, you may untap Blasting Station.

{T}, Sacrifice an artifact: Target player mills three cards. Whenever an artifact enters the battlefield, you may untap Grinding Station.

Whenever a nontoken creature enters the battlefield, if Genesis Chamber is untapped, that creature's controller creates a 1/1 colorless Myr artifact creature token.

When Imperial Recruiter enters the battlefield, search your library for a creature card with power 2 or less, reveal it, put it into your hand, then shuffle.

{T}, Sacrifice three artifacts: Search your library for an artifact card, put it onto the battlefield, then shuffle.

Tap two untapped artifacts you control: Untap target artifact.