Akiri, Line-Slinger

First strike, vigilance
Akiri, Line-Slinger gets +1/+0 for each artifact you control.
Partner (You can have two commanders if both have partner.)

Darksteel Citadel

Ancient Den

Great Furnace

Etherium Sculptor

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

Seat of the Synod

Arcane Signet

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

Vault of Whispers

Silas Renn, Seeker Adept

Deathtouch
Whenever Silas Renn, Seeker Adept deals combat damage to a player, choose target artifact card in your graveyard. You may cast that card this turn.
Partner (You can have two commanders if both have partner.)