Courier's Capsule

{1}{U}, {T}, Sacrifice Courier's Capsule: Draw two cards.

Thoughtcast

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

Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

Scrapyard Salvo deals damage to target player or planeswalker equal to the number of artifact cards in your graveyard.

When Ichor Wellspring enters or is put into a graveyard from the battlefield, draw a card.

Draw two cards, then sacrifice a permanent.

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

{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.

{1}, {T}, Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.

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