Myr Enforcer

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

Darksteel Citadel

{T}, Tap an untapped creature you control: 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.

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

Draw two cards, then sacrifice a permanent.

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

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

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

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

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