Great Furnace

Pyroblast

Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.

Ardent Recruit

Metalcraft - This creature gets +2/+2 as long as you control three or more artifacts.

End the Festivities

End the Festivities deals 1 damage to each opponent and each creature and planeswalker they control.

Dispel

Frogmite

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

Ancient Den

Seat of the Synod

Galvanic Blast

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

Crimson Acolyte

Protection from red
{W}: Target creature gains protection from red until end of turn.

Myr Enforcer

Springleaf Drum

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

Rustvale Bridge

This land enters tapped.
Indestructible
{T}: Add {R} or {W}.

Gingerbrute

Haste (This creature can attack and {T} as soon as it comes under your control.)
{1}: This creature can't be blocked this turn except by creatures with haste.
{2}, {T}, Sacrifice this creature: You gain 3 life.

Experimental Synthesizer

When this artifact enters or leaves the battlefield, exile the top card of your library. Until end of turn, you may play that card.
{2}{R}, Sacrifice this artifact: Create a 2/2 white Samurai creature token with vigilance. Activate only as a sorcery.

Silverbluff Bridge

This land enters tapped.
Indestructible
{T}: Add {U} or {R}.

Razortide Bridge

This land enters tapped.
Indestructible
{T}: Add {W} or {U}.

All That Glitters

Enchant creature
Enchanted creature gets +1/+1 for each artifact and/or enchantment you control.

Gorilla Shaman

{X}{X}{1}: Destroy target noncreature artifact with mana value X.

Reckless Impulse

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Thoughtcast

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

Glint Hawk

Flying
When this creature enters, sacrifice it unless you return an artifact you control to its owner's hand.