Riddlesmith

Whenever you cast an artifact spell, you may draw a card. If you do, discard a card.

Repulse

Return target creature to its owner's hand.
Draw a card.

Sword of the Meek

Equipped creature gets +1/+2.
Equip {2}
Whenever a 1/1 creature you control enters, you may return this card from your graveyard to the battlefield, then attach it to that creature.

Obelisk of Esper

Aether Spellbomb

{U}, Sacrifice this artifact: Return target creature to its owner's hand.
{1}, Sacrifice this artifact: Draw a card.

Myr Propagator

{3}, {T}: Create a token that's a copy of this creature.

Island

Plains

Impulse

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Perilous Myr

When this creature dies, it deals 2 damage to any target.

Mana Leak

Counter target spell unless its controller pays {3}.

Ancient Den

Arcane Sanctum

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

Sydri, Galvanic Genius

{U}: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn.
{W}{B}: Target artifact creature gains deathtouch and lifelink until end of turn.

Winter Orb

As long as this artifact is untapped, players can't untap more than one land during their untap steps.

Courier's Capsule

{1}{U}, {T}, Sacrifice this artifact: Draw two cards.

Anguished Unmaking

Exile target nonland permanent. You lose 3 life.

Negate

Master of Etherium

Master of Etherium's power and toughness are each equal to the number of artifacts you control.
Other artifact creatures you control get +1/+1.

Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Draw a card.

Myrsmith

Whenever you cast an artifact spell, you may pay {1}. If you do, create a 1/1 colorless Myr artifact creature token.

Repeal

Return target nonland permanent with mana value X to its owner's hand.
Draw a card.

Tranquil Cove

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {W} or {U}.

Gold Myr

Darksteel Citadel

Etched Champion

Metalcraft — This creature has protection from each color as long as you control three or more artifacts.

Thopter Foundry

{1}, Sacrifice a nontoken artifact: Create a 1/1 blue Thopter artifact creature token with flying. You gain 1 life.

Shimmer Myr

Flash
You may cast artifact spells as though they had flash.

Scoured Barrens

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {W} or {B}.

Azorius Guildgate

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

Tempered Steel

Artifact creatures you control get +2/+2.

Leaden Myr

Palladium Myr

Mishra's Factory

{T}: Add {C}.
{1}: This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Artificer's Epiphany

Draw two cards. If you control no artifacts, discard a card.

Thirst for Knowledge

Draw three cards. Then discard two cards unless you discard an artifact card.

Myr Reservoir

{T}: Add {C}{C}. Spend this mana only to cast Myr spells or activate abilities of Myr.
{3}, {T}: Return target Myr card from your graveyard to your hand.

Scrap Trawler

Whenever this creature dies or another artifact you control is put into a graveyard from the battlefield, return to your hand target artifact card in your graveyard with lesser mana value.

Inventors' Fair

At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life.
{T}: Add {C}.
{4}, {T}, Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.

Vault of Whispers

Jwar Isle Refuge

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {U} or {B}.

Myr Superion

Spend only mana produced by creatures to cast this spell.

Silver Myr

Steel Overseer

{T}: Put a +1/+1 counter on each artifact creature you control.

Detention Sphere

When this enchantment enters, you may exile target nonland permanent not named Detention Sphere and all other permanents with the same name as that permanent.
When this enchantment leaves the battlefield, return the exiled cards to the battlefield under their owner's control.

Swamp

Seat of the Synod

Myr Galvanizer

Other Myr creatures you control get +1/+1.
{1}, {T}: Untap each other Myr you control.