Fling

As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.

Atog

Sacrifice an artifact: Atog gets +2/+2 until end of turn.

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

Sacrifice an Atog creature: Atogatog gets +X/+X until end of turn, where X is the sacrificed creature's power.

{0}: Chronatog gets +3/+3 until end of turn. You skip your next turn. Activate only once each turn.

Exile the top creature card of your graveyard: Necratog gets +2/+2 until end of turn.

{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.

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

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

{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.

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

{T}: Add {C}.
{T}, Pay 1 life: Add one mana of any color. Activate only if you control an artifact.