Thoughtcast

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

Ancient Den

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

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

This spell costs {1} less to cast for each artifact you control.
{5}{U}: Gearseeker Serpent can't be blocked this turn.

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

Fire deals 2 damage divided as you choose among one or two targets.

{W}, Sacrifice Auriok Replica: Prevent all damage a source of your choice would deal to you this turn.

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

Metalcraft — Carapace Forger gets +2/+2 as long as you control three or more artifacts.