Seat of the Synod

Springleaf Drum

{T}, Tap an untapped creature you control: Add one mana of any color.

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

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.)

This spell costs {2} less to cast if you control a Human creature and a non-Human creature.
Draw two cards.

When Thraben Inspector enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

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

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

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

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

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