Welding Sparks

Welding Sparks deals X damage to target creature, where X is 3 plus the number of artifacts you control.

Great Furnace

Mountain

Chain Lightning

Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose a new target for that copy.

Mox Sapphire

Fabricate

Search your library for an artifact card, reveal it, put it into your hand, then shuffle.

Black Lotus

{T}, Sacrifice Black Lotus: Add three mana of any one color.

Chain Reaction

Chain Reaction deals X damage to each creature, where X is the number of creatures on the battlefield.

Volcanic Island

Blasphemous Act

This spell costs {1} less to cast for each creature on the battlefield.
Blasphemous Act deals 13 damage to each creature.

Harvest Pyre

As an additional cost to cast this spell, exile X cards from your graveyard.
Harvest Pyre deals X damage to target creature.

Seat of the Synod

Copy Artifact

You may have Copy Artifact enter as a copy of any artifact on the battlefield, except it's an enchantment in addition to its other types.

Gauntlet of Might

Red creatures get +1/+1.
Whenever a Mountain is tapped for mana, its controller adds an additional {R}.

Reconstruction

Return target artifact card from your graveyard to your hand.

Earthquake

Earthquake deals X damage to each creature without flying and each player.

Stuffy Doll

Indestructible
As Stuffy Doll enters, choose a player.
Whenever Stuffy Doll is dealt damage, it deals that much damage to the chosen player.
{T}: Stuffy Doll deals 1 damage to itself.

Galvanic Blast

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

Sol Ring

Mox Ruby

Gilded Lotus

Blazing Effigy

When Blazing Effigy dies, it deals X damage to target creature, where X is 3 plus the amount of damage dealt to Blazing Effigy this turn by other sources named Blazing Effigy.