Salvage Scout

{W}, Sacrifice Salvage Scout: Return target artifact card from your graveyard to your hand.

Oblivion Ring

When Oblivion Ring enters, exile another target nonland permanent.
When Oblivion Ring leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Springleaf Drum

{T}, Tap an untapped creature you control: Add one mana of any color.

Ancient Den

Journey to Nowhere

When Journey to Nowhere enters, exile target creature.
When Journey to Nowhere leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Frogmite

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

Court Homunculus

Court Homunculus gets +1/+1 as long as you control another artifact.

Glint Hawk

Flying
When Glint Hawk enters, sacrifice it unless you return an artifact you control to its owner's hand.

Myr Enforcer

Ardent Recruit

Metalcraft — Ardent Recruit gets +2/+2 as long as you control three or more artifacts.

Murder

Salvage Slasher

Salvage Slasher gets +1/+0 for each artifact card in your graveyard.

Welding Jar

Sacrifice Welding Jar: Regenerate target artifact.

Ornithopter

Glint Hawk Idol

Whenever another artifact you control enters, you may have Glint Hawk Idol become a 2/2 Bird artifact creature with flying until end of turn.
{W}: Glint Hawk Idol becomes a 2/2 Bird artifact creature with flying until end of turn.

Lotus Petal

{T}, Sacrifice Lotus Petal: Add one mana of any color.

Vault of Whispers

Perilous Myr

When Perilous Myr dies, it deals 2 damage to any target.

Glaze Fiend

Flying
Whenever another artifact you control enters, Glaze Fiend gets +2/+2 until end of turn.

Vault Skirge

({B/P} can be paid with either {B} or 2 life.)
Flying
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Plains

Auriok Sunchaser

Metalcraft — As long as you control three or more artifacts, Auriok Sunchaser gets +2/+2 and has flying.