Perilous Research

Draw two cards, then sacrifice a permanent.

Scrapyard Salvo

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

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

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

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

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.)

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

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

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

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

{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.