Commander creatures you own have "Whenever an artifact or creature you control is put into a graveyard from the battlefield, each opponent loses 1 life."

Other artifact creatures you control have haste.

Whenever one or more artifact creatures you control attack, Alibou, Ancient Witness deals X damage to any target and you scry X, where X is the number of tapped artifacts you control.

Enchant creature

Enchanted creature gets +1/+1 for each artifact and/or enchantment you control.

{T}: Add one mana of any color.

{T}: Add {W}.

Lord of the Pyrrhian Legions -- Whenever Anrakyr the Traveller attacks, you may cast an artifact spell from your hand or graveyard by paying life equal to its mana value rather than paying its mana cost.

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

Return target artifact or enchantment card from your graveyard to your hand.

{T}, Sacrifice another creature or artifact: Ayara, Widow of the Realm deals X damage to target opponent or battle and you gain X life, where X is the sacrificed permanent's mana value.

{5}{R/P}: Transform Ayara. Activate only as a sorcery. ({R/P} can be paid with either {R} or 2 life.)

At the beginning of combat on your turn, return up to one target artifact or creature card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step.

Destroy target artifact, creature, or planeswalker.

Creatures you control are artifacts in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Whenever you cast an artifact spell, you lose 1 life and create a 2/2 black Necron Warrior artifact creature token.

More Than Meets the Eye {3}{B} (You may cast this card converted for {3}{B}.)

At the beginning of your end step, target opponent loses life equal to the life that player lost this turn. If no life is lost this way, convert Blitzwing.

Living metal (As long as it's your turn, this Vehicle is also a creature.)

At the beginning of combat on your turn, choose flying or indestructible at random. Blitzwing gains that ability until end of turn.

Whenever Blitzwing deals combat damage to a player, convert it.

Return all artifact and enchantment cards from your graveyard to the battlefield.

{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Flying

Fabricator Claw Array -- Whenever another nontoken artifact creature or Vehicle enters the battlefield under your control, draw a card.

Wraith Form -- Canoptek Wraith can't be blocked.

Transdimensional Scout -- When Canoptek Wraith deals combat damage to a player, you may pay {3} and sacrifice it. If you do, choose a land you control. Then search your library for up to two basic land cards which have the same name as the chosen land, put them onto the battlefield tapped, then shuffle.

Trample

Battle Cannon -- When Chaos Defiler enters the battlefield or dies, for each opponent, choose a nonland permanent that player controls. Destroy one of them chosen at random.

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}: Add one mana of any color in your commander's color identity.

Sacrifice Commander's Sphere: Draw a card.

{1}{B}, {T}: Choose another target artifact creature you control. When that creature dies this turn, return it to the battlefield tapped under your control.

Protector -- Other artifact creatures you control have hexproof.

+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.

Add {B}{B}{B}.

Indestructible

{T}: Add {C}.

Trample, indestructible

If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead.

Artifacts you control have indestructible. (Effects that say "destroy" don't destroy them. Artifact creatures with indestructible can't be destroyed by damage.)

Indestructible

Once each turn, you may pay {0} rather than pay the mana cost for a colorless spell that you cast from your hand.

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

Exile target permanent with mana value 4 or greater.

Tap target creature.

Metalcraft -- If you control three or more artifacts, exile that creature.

Drossforge Bridge enters the battlefield tapped.

Indestructible

{T}: Add {B} or {R}.

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

If a source you control would deal damage to a permanent or player, it deals triple that damage to that permanent or player instead.

If you control a commander, you may cast this spell without paying its mana cost.

Creatures you control gain indestructible until end of turn.

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

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

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}: Add {W}.

Goldmire Bridge enters the battlefield tapped.

Indestructible

{T}: Add {W} or {B}.

{T}: Add {R}.

All artifacts have shroud. (They can't be the targets of spells or abilities.)

Flying, vigilance

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

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Whenever Ichorclaw Myr becomes blocked, it gets +2/+2 until end of turn.

Flying

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

Karn, Legacy Reforged's power and toughness are each equal to the greatest mana value among artifacts you control.

At the beginning of your upkeep, add {C} for each artifact you control. This mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.

Artifacts, creatures, and lands your opponents control enter the battlefield tapped.

Prevent all combat damage that would be dealt to attacking artifact creatures you control.

Whenever one or more artifact creatures enter the battlefield under your control, draw a card. This ability triggers only once each turn.

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

Target player draws X cards and loses X life, where X is the number of artifacts you control.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

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.

Menace

When Noxious Gearhulk enters the battlefield, you may destroy another target creature. If a creature is destroyed this way, you gain life equal to its toughness.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)

Destroy all nonartifact creatures.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Put a +1/+1 counter on up to one target creature. That creature becomes an artifact in addition to its other types.

II -- Destroy all nonartifact creatures.

III -- Exile all opponents' graveyards.

When Phyrexian Triniform dies, create three 3/3 colorless Phyrexian Golem artifact creature tokens.

Encore {12} ({12}, 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.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

More Than Meets the Eye {1}{W} (You may cast this card converted for {1}{W}.)

Lifelink

Whenever you gain life, you may convert Ratchet. When you do, return target artifact card with mana value less than or equal to the amount of life you gained this turn from your graveyard to the battlefield tapped.

Living metal (As long as it's your turn, this Vehicle is also a creature.)

Lifelink

Whenever one or more nontoken artifacts you control are put into a graveyard from the battlefield, convert Ratchet. This ability triggers only once each turn.

Return target artifact, enchantment, or planeswalker card from your graveyard to the battlefield. Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")

Menace

When Ruin Grinder dies, each player may discard their hand and draw seven cards.

Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Rustvale Bridge enters the battlefield tapped.

Indestructible

{T}: Add {R} or {W}.

Domain -- This spell costs {2} less to cast for each basic land type among lands you control.

Flying

Each creature you control has vigilance if it's white, hexproof if it's blue, lifelink if it's black, first strike if it's red, and trample if it's green.

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.

Flash

You may cast artifact spells as though they had flash.

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

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.

More Than Meets the Eye {2}{B} (You may cast this card converted for {2}{B}.)

Flying

Whenever you draw a card, if you're the monarch, target opponent loses 2 life.

Whenever one or more creatures deal combat damage to you, convert Starscream.

Living metal (As long as it's your turn, this Vehicle is also a creature.)

Flying, menace, haste

Whenever Starscream deals combat damage to a player, if there is no monarch, that player becomes the monarch.

Whenever you become the monarch, convert Starscream.

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

Artifact creatures you control get +2/+2.

Destroy all nonartifact creatures.

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

Flying, vigilance, trample

When Triplicate Titan dies, create a 3/3 colorless Golem artifact creature token with flying, a 3/3 colorless Golem artifact creature token with vigilance, and a 3/3 colorless Golem artifact creature token with trample.

Untap all artifacts you control during each other player's untap step.

{T}: Add {B}.

Return all artifact cards from your graveyard to the battlefield. They gain haste until end of turn.

When Workshop Assistant dies, return another target artifact card from your graveyard to your hand.

Deathtouch, lifelink

When Wurmcoil Engine dies, create a 3/3 colorless Phyrexian Wurm artifact creature token with deathtouch and a 3/3 colorless Phyrexian Wurm artifact creature token with lifelink.