: Add . If you control an Urza's Mine and an Urza's Tower, add instead.

: Add . Spend this mana only to cast artifact spells.

: Add .
, Sacrifice this land: Destroy target land.

Flying

: Add . If you control an Urza's Mine and an Urza's Power-Plant, add instead.

: Add .
: This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
: Target Assembly-Worker creature gets +1/+1 until end of turn.

: Add . If you control an Urza's Power-Plant and an Urza's Tower, add instead.

Counter target artifact spell.

Return target artifact card from your graveyard to your hand.

As this artifact enters, choose an opponent.
At the beginning of the chosen player's upkeep, this artifact deals X damage to that player, where X is 3 minus the number of cards in their hand.

Whenever a player casts an artifact spell, you may pay . If you do, you gain 1 life.

Destroy target artifact with mana value X. It can't be regenerated. Detonate deals X damage to that artifact's controller.

, : Return target permanent you both own and control to your hand.

: Flip a coin. If you win the flip, draw a card. If you lose the flip, counter target artifact spell you control that isn't the target of an ability from another creature named Goblin Artisans.

Whenever an artifact you control is put into a graveyard from the battlefield, you may pay . If you do, you gain 1 life.

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

Enchant creature
Enchanted creature can't be blocked by artifact creatures.
Prevent all damage that would be dealt to enchanted creature by artifact sources.
Enchanted creature can't be the target of abilities from artifact sources.

, Exile this artifact: Shuffle your graveyard into your library.

Destroy target artifact. It can't be regenerated. That artifact's controller gains life equal to its mana value.

, Sacrifice this artifact: Put a +1/+1 counter on target nonartifact creature. That creature becomes an artifact in addition to its other types.

, : Untap X target lands.

Put any number of target artifact cards from target player's graveyard on top of their library in any order.

Enchant artifact
Enchanted artifact's activated abilities cost less to activate. This effect can't reduce the mana in that cost to less than one mana.

, Sacrifice an artifact: Put a +1/+1 counter on target creature. Activate only during your upkeep.

, : Target player mills two cards.

Return all artifacts target player owns to their hand.

Sacrifice an artifact: This creature gets +2/+2 until end of turn.

At the beginning of combat on your turn, this creature gains banding until end of combat. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's blocking.)
Whenever this creature becomes blocked by a Wall, destroy that Wall at end of combat.

Whenever an opponent casts an artifact spell, put a +1/+1 counter on this creature.

Sacrifice a creature: Destroy target artifact. Activate only during your upkeep and only once each turn.

This creature can't be blocked by artifact creatures.
Prevent all damage that would be dealt to this creature by artifact creatures.

Sacrifice an artifact. If you do, search your library for an artifact card. If that card's mana value is less than or equal to the sacrificed artifact's mana value, put it onto the battlefield. If it's greater, you may pay , where X is the difference. If you do, put it onto the battlefield. If you don't, put it into its owner's graveyard. Then shuffle.

Whenever an artifact an opponent controls becomes tapped or an opponent activates an artifact's ability without in its activation cost, you gain 1 life.

You may choose not to untap this artifact during your untap step.
, : Target creature you control gets +2/-2 for as long as this artifact remains tapped.

, : Prevent the next 1 damage that would be dealt to any target this turn.

, Sacrifice an artifact: Draw a card.