Origin Spellbomb

{1}, {T}, Sacrifice Origin Spellbomb: Create a 1/1 colorless Myr artifact creature token.
When Origin Spellbomb is put into a graveyard from the battlefield, you may pay {W}. If you do, draw a card.

Gold Myr

Linvala, Keeper of Silence

Flying
Activated abilities of creatures your opponents control can't be activated.

Revoke Existence

Howling Mine

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

Safe Passage

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

Sword of Body and Mind

Equipped creature gets +2/+2 and has protection from green and from blue.
Whenever equipped creature deals combat damage to a player, you create a 2/2 green Wolf creature token and that player mills ten cards.
Equip {2}

Perilous Myr

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

Platinum Emperion

Your life total can't change. (You can't gain or lose life. You can't pay any amount of life except 0.)

Arrest

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

Iona's Judgment

Voltaic Key

Relic Barrier

Angelheart Vial

Whenever you're dealt damage, you may put that many charge counters on Angelheart Vial.
{2}, {T}, Remove four charge counters from Angelheart Vial: You gain 2 life and draw a card.

Myr Propagator

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

Sunblast Angel

Flying
When Sunblast Angel enters, destroy all tapped creatures.

Auriok Sunchaser

Metalcraft — As long as you control three or more artifacts, Auriok Sunchaser gets +2/+2 and has flying.

Dispense Justice

Target player sacrifices an attacking creature of their choice.
Metalcraft — That player sacrifices two attacking creatures of their choice instead if you control three or more artifacts.

Myr Galvanizer

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

Plains

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.