Chief Engineer

Artifact spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting an artifact spell pays for {1} or one mana of that creature's color.)

Grand Architect

Other blue creatures you control get +1/+1.
{U}: Target artifact creature becomes blue until end of turn.
Tap an untapped blue creature you control: Add {C}{C}. Spend this mana only to cast artifact spells or activate abilities of artifacts.

Experimental Aviator

Flying
When this creature enters, create two 1/1 colorless Thopter artifact creature tokens with flying.

Aether Swooper

Flying
When this creature enters, you get {E}{E} (two energy counters).
Whenever this creature attacks, you may pay {E}{E}. If you do, create a 1/1 colorless Servo artifact creature token.

Bastion Inventor

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Aviary Mechanic

When this creature enters, you may return another permanent you control to its owner's hand.

Propeller Pioneer

Flying
Fabricate 1 (When this creature enters, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.)

Daring Archaeologist

When this creature enters, you may return target artifact card from your graveyard to your hand.
Whenever you cast a historic spell, put a +1/+1 counter on this creature. (Artifacts, legendaries, and Sagas are historic.)

Aerial Engineer

As long as you control an artifact, this creature gets +2/+0 and has flying.

Automated Artificer

{T}: Add {C}. Spend this mana only to activate an ability or cast an artifact spell.

Brotherhood Scribe

Metalcraft — {T}: You get {E} (an energy counter). Activate only if you control three or more artifacts.
Whenever you get one or more {E} during your turn, creatures you control get +1/+1 until end of turn.

Forensic Gadgeteer

Whenever you cast an artifact spell, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")
Activated abilities of artifacts you control cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Miles "Tails" Prower

Flash
Flying
Whenever a Vehicle you control enters, draw a card if it has flying. Otherwise, put a flying counter on it.

Cloudsculpt Technician

Flying
As long as you control an artifact, this creature gets +1/+0.

Faerie Mechanist

Flying
When this creature enters, look at the top three cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Faerie Artisans

Flying
Whenever a nontoken creature an opponent controls enters, create a token that's a copy of that creature except it's an artifact in addition to its other types. Then exile all other tokens created with this creature.

Aviation Pioneer

When this creature enters, create a 1/1 colorless Thopter artifact creature token with flying.

Aeronaut Tinkerer

This creature has flying as long as you control an artifact. (It can't be blocked except by creatures with flying or reach.)

Guidelight Synergist

Flying
This creature gets +1/+0 for each artifact you control.

Aspiring Aeronaut

Flying (This creature can't be blocked except by creatures with flying or reach.)
When this creature enters, create a 1/1 colorless Thopter artifact creature token with flying.