Etherium Sculptor

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

Azorius Signet

Reliquary Tower

You have no maximum hand size.
{T}: Add {C}.

Dimir Signet

Arcane Signet

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

Thought Vessel

Caretaker's Talent

(Gain the next level as a sorcery to add its ability.)
Whenever one or more tokens you control enter, draw a card. This ability triggers only once each turn.
{W}: Level 2
When this Class becomes level 2, create a token that's a copy of target token you control.
{3}{W}: Level 3
Creature tokens you control get +2/+2.

Unwinding Clock

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

Chief of the Foundry

Other artifact creatures you control get +1/+1.

Orzhov Signet

Command Tower

Counterspell

Urza, Chief Artificer

Affinity for artifact creatures (This spell costs {1} less to cast for each artifact creature you control.)
Artifact creatures you control have menace.
At the beginning of your end step, create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."