At the beginning of your upkeep, put a +1/+1 counter on each creature with modular you control.

Modular 6 (This creature enters the battlefield with six +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager.

Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Flying

Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Basalt Monolith doesn't untap during your untap step.

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

{3}: Untap Basalt Monolith.

At the beginning of each player's precombat main phase, if Blinkmoth Urn is untapped, that player adds {C} for each artifact they control.

Trample

{3}{R}, Sacrifice an artifact: Bosh, Iron Golem deals damage equal to the sacrificed artifact's mana value to any target.

Defender, indestructible

{10}: Monstrosity 10. (If this creature isn't monstrous, put ten +1/+1 counters on it and it becomes monstrous.)

As long as Colossus of Akros is monstrous, it has trample and can attack as though it didn't have defender.

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.

Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.)

Choose any target, then choose another target for each time this spell was kicked. Comet Storm deals X damage to each of them.

+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.

Indestructible

{T}: Add {C}.

Indestructible

{T}: Add one mana of any color.

Dead deals 2 damage to target creature.

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Return target creature you don't control to its owner's hand.

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

Flying

Domain -- At the beginning of your upkeep, sacrifice Draco unless you pay {10}. This cost is reduced by {2} for each basic land type among lands you control.

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

{3}, {T}, Sacrifice Dreamstone Hedron: Draw three cards.

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

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.)

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

As an additional cost to cast this spell, sacrifice a creature.

Fling deals damage equal to the sacrificed creature's power to any target.

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

{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.

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

{T}: Add {R}.

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

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

Whenever a player casts a spell, they may pay {1}. If the player does, they draw a card at the beginning of the next end step.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

Whenever an ability of equipped creature is activated, if it isn't a mana ability, copy that ability. You may choose new targets for the copy.

Equip {3}

{T}: Add {R}.

Jaws of Stone deals X damage divided as you choose among any number of targets, where X is the number of Mountains you control as you cast this spell.

Flying

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

Trample

Keldon Battlewagon can't block.

When Keldon Battlewagon attacks, sacrifice it at end of combat.

Tap an untapped creature you control: Keldon Battlewagon gets +X/+0 until end of turn, where X is the power of the creature tapped this way.

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

{2}, {T}: Choose a card name. Target opponent guesses whether a card with that name is in your hand. You may reveal your hand. If you do and your opponent guessed wrong, draw a card.

{T}: Add {C}.

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

Trample

Tap an untapped artifact you control: Lodestone Myr gets +1/+1 until end of turn.

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.

Whenever another nontoken artifact enters the battlefield under your control, you may pay {2}. If you do, create a token that's a copy of that artifact.

{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.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

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.

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

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

{T}: Add one mana of any color.

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

{2}, {T}, Sacrifice a creature: Draw a card.

Whenever you activate an ability, if it isn't a mana ability, you may pay {2}. If you do, copy that ability. You may choose new targets for the copy.

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.

{T}: Add one mana of any color.

{T}: Target creature becomes the color or colors of your choice until end of turn.

Imprint -- When Semblance Anvil enters the battlefield, you may exile a nonland card from your hand.

Spells you cast that share a card type with the exiled card cost {2} less to cast.

Flash

You may cast artifact spells as though they had flash.

{T}: Add {C}.

{T}: Add {C}{C}. Spend this mana only to cast colorless spells. Activate only if you control seven or more lands.

Players can't gain life this turn. Damage can't be prevented this turn. Skullcrack deals 3 damage to target player or planeswalker.

Slag Fiend's power and toughness are each equal to the number of artifact cards in all graveyards.

{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.

{T}, Tap an untapped creature you control: Add one mana of any color.

{T}: Put a +1/+1 counter on each artifact creature you control.

{T}: Create a 2/2 colorless Pincher creature token.

Whenever an artifact is put into a graveyard from the battlefield, you may untap Summoning Station.

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

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

As an additional cost to cast this spell, discard a card.

Draw two cards.

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

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

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

Destroy target artifact you don't control.

Overload {4}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

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

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

As an additional cost to cast this spell, discard a card.

Draw two cards.

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