Workshop Assistant

When Workshop Assistant dies, return another target artifact card from your graveyard to your hand.

Ashnod's Altar

When Prophetic Prism enters, draw a card.
{1}, {T}: Add one mana of any color.

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

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

When Myr Retriever dies, return another target artifact card from your graveyard to your hand.

Whenever an artifact you control enters, Reckless Fireweaver deals 1 damage to each opponent.

This spell costs {2} less to cast if you control a Human creature and a non-Human creature.
Draw two cards.

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

Galvanic Blast deals 2 damage to any target.
Metalcraft — Galvanic Blast deals 4 damage instead if you control three or more artifacts.

Whenever an artifact is put into a graveyard from the battlefield, you may have target opponent lose 1 life.

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color.
When Chromatic Star is put into a graveyard from the battlefield, draw a card.