As an additional cost to cast this spell, discard two cards. Draw three cards.

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.)

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

Choose one. If you control a commander as you cast this spell, you may choose both instead. • Add {R} for each card in target opponent's hand. • Exile the top three cards of your library. You may play them this turn.

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

As an additional cost to cast this spell, discard a card. Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

{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 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.

At the beginning of your upkeep, draw a card. {T}: Staff of Nin deals 1 damage to any target.

As an additional cost to cast this spell, discard a card. Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

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

Indestructible {T}: Add {C}.

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 {R}.)

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

If Scorched Ruins would enter the battlefield, sacrifice two untapped lands instead. If you do, put Scorched Ruins onto the battlefield. If you don't, put it into its owner's graveyard. {T}: Add {C}{C}{C}{C}.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Urza's Saga gains "{T}: Add {C}." II — Urza's Saga gains "{2}, {T}: Create a 0/0 colorless Construct artifact creature token with 'This creature gets +1/+1 for each artifact you control.'" III — Search your library for an artifact card with mana cost {0} or {1}, put it onto the battlefield, then shuffle.

Valakut, the Molten Pinnacle enters the battlefield tapped. Whenever a Mountain enters the battlefield under your control, if you control at least five other Mountains, you may have Valakut, the Molten Pinnacle deal 3 damage to any target. {T}: Add {R}.

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.

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

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

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

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

{T}: Reveal any number of artifact cards in your hand. Add {C}{C} for each card revealed this way.

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

{1}, {T}, Sacrifice Moonsilver Key: Search your library for an artifact card with a mana ability or a basic land card, reveal it, put it into your hand, then shuffle.

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.)

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

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.

If you control a commander, you may cast this spell without paying its mana cost. You may choose new targets for target spell or ability.

Whenever Dragonspark Reactor or another artifact enters the battlefield under your control, put a charge counter on Dragonspark Reactor. {4}, Sacrifice Dragonspark Reactor: It deals damage equal to the number of charge counters on it to target player and that much damage to up to one target creature.

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

When Spine of Ish Sah enters the battlefield, destroy target permanent. When Spine of Ish Sah is put into a graveyard from the battlefield, return Spine of Ish Sah to its owner's hand.

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

Tap two untapped artifacts you control: Untap target artifact.

+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.

Whenever Dross Scorpion or another artifact creature dies, you may untap target artifact.

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

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.

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

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

Imprint — Whenever a nontoken creature dies, you may exile that card. If you do, return each other card exiled with Mimic Vat to its owner's graveyard. {3}, {T}: Create a token that's a copy of a card exiled with Mimic Vat. It gains haste. Exile it at the beginning of the next end step.

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

{T}: Create a 1/1 colorless Myr artifact creature token. {T}, Tap five untapped Myr you control: Search your library for a Myr creature card, put it onto the battlefield, then shuffle.

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.

{3}: Untap Retrofitter Foundry. {2}, {T}: Create a 1/1 colorless Servo artifact creature token. {1}, {T}, Sacrifice a Servo: Create a 1/1 colorless Thopter artifact creature token with flying. {T}, Sacrifice a Thopter: Create a 4/4 colorless Construct artifact creature token.

Each player exiles all artifact cards from their graveyard, then sacrifices all artifacts they control, then puts all cards they exiled this way onto the battlefield.

Whenever Scrap Trawler or another artifact you control is put into a graveyard from the battlefield, return to your hand target artifact card in your graveyard with lesser mana value.

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

Flying At the beginning of your upkeep, if you control no Thopters other than Thopter Assembly, return Thopter Assembly to its owner's hand and create five 1/1 colorless Thopter artifact creature tokens with flying.

As an additional cost to cast this spell, sacrifice an artifact. Return target artifact card from your graveyard to the battlefield.

Each nonland card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard. (You may cast cards from your graveyard for their escape cost.) At the beginning of the end step, sacrifice Underworld Breach.

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

Tap two untapped artifacts you control: Ghirapur Aether Grid deals 1 damage to any target.

Whenever a creature enters the battlefield under your control, Impact Tremors deals 1 damage to each opponent.

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.

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

First strike When Combustible Gearhulk enters the battlefield, target opponent may have you draw three cards. If the player doesn't, you mill three cards, then Combustible Gearhulk deals damage to that player equal to the total mana value of those cards.

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.