Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Steal Artifact

Enchant artifact
You control enchanted artifact.

Dragon Engine

{2}: Dragon Engine gets +1/+0 until end of turn.

Mountain

Shatter

Onulet

Counterspell

Reconstruction

Return target artifact card from your graveyard to your hand.

Brass Man

Brass Man doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {1}. If you do, untap Brass Man.

Atog

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

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Unsummon

Return target creature to its owner's hand.