Hard Evidence

Create a 0/3 blue Crab creature token.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Seat of the Synod

Steelfin Whale

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Whenever an artifact you control enters, untap Steelfin Whale.

Glacian, Powerstone Engineer

{T}, Tap X untapped artifacts you control: Look at the top X cards of your library. Put one of those cards into your hand and the rest into your graveyard.
Partner (You can have two commanders if both have partner.)

Thriving Isle

Thriving Isle enters tapped. As it enters, choose a color other than blue.
{T}: Add {U} or one mana of the chosen color.

Metallic Rebuke

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Counter target spell unless its controller pays {3}.

Voltaic Servant

At the beginning of your end step, untap target artifact.

Island

Stoic Rebuttal

Metalcraft — This spell costs {1} less to cast if you control three or more artifacts.
Counter target spell.

Accomplished Automaton

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

Watchful Automaton

{2}{U}: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Sky Diamond

Etherium Sculptor

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

Faerie Mechanist

Flying
When Faerie Mechanist 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.

Silver Raven

Flying
When Silver Raven enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Corridor Monitor

When Corridor Monitor enters, untap target artifact or creature you control.

Witching Well

When Witching Well enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)
{3}{U}, Sacrifice Witching Well: Draw two cards.

Universal Solvent

{7}, {T}, Sacrifice Universal Solvent: Destroy target permanent.

Gleaming Barrier

Defender
When Gleaming Barrier dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Scholar of Stars

When Scholar of Stars enters, if you control an artifact, draw a card.

Temporal Machinations

Return target creature to its owner's hand. If you control an artifact, draw a card.

Bloodtallow Candle

{6}, {T}, Sacrifice Bloodtallow Candle: Target creature gets -5/-5 until end of turn.