Myrsmith

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

Spirit Mantle

Enchant creature
Enchanted creature gets +1/+1 and has protection from creatures.

Plains

Semblance Anvil

Imprint — When Semblance Anvil enters, you may exile a nonland card from your hand.
Spells you cast that share a card type with the exiled card cost {2} less to cast.

Strata Scythe

Imprint — When Strata Scythe enters, search your library for a land card, exile it, then shuffle.
Equipped creature gets +1/+1 for each land on the battlefield with the same name as the exiled card.
Equip {3}

Ritual of Restoration

Return target artifact card from your graveyard to your hand.

Master's Call

Create two 1/1 colorless Myr artifact creature tokens.

Safe Passage

Prevent all damage that would be dealt to you and creatures you control this turn.

Perilous Myr

When Perilous Myr dies, it deals 2 damage to any target.

Shimmer Myr

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

Myr Servitor

At the beginning of your upkeep, if Myr Servitor is on the battlefield, each player returns all cards named Myr Servitor from their graveyard to the battlefield.

Arrest

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Intangible Virtue

Creature tokens you control get +1/+1 and have vigilance.

Roar of Reclamation

Each player returns all artifact cards from their graveyard to the battlefield.

Mirage Mirror

{2}: Mirage Mirror becomes a copy of target artifact, creature, enchantment, or land until end of turn.

Myr Propagator

{3}, {T}: Create a token that's a copy of Myr Propagator.

Myr Battlesphere

When Myr Battlesphere enters, create four 1/1 colorless Myr artifact creature tokens.
Whenever Myr Battlesphere attacks, you may tap X untapped Myr you control. If you do, Myr Battlesphere gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.

Myr Matrix

Indestructible (Effects that say "destroy" don't destroy this artifact.)
Myr creatures get +1/+1.
{5}: Create a 1/1 colorless Myr artifact creature token.

Erase

Argentum Armor

Equipped creature gets +6/+6.
Whenever equipped creature attacks, destroy target permanent.
Equip {6}

Steel Overseer

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

Myr Galvanizer

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

Myr Turbine

{T}: Create a 1/1 colorless Myr artifact creature token.
{T}, Tap five untapped Myr you control: Search your library for a Myr creature card, put it onto the battlefield, then shuffle.

Palladium Myr

Platinum Angel

Flying
You can't lose the game and your opponents can't win the game.

Leave No Trace

Radiance — Destroy target enchantment and each other enchantment that shares a color with it.