Shimmer Myr

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

Darksteel Citadel

Unwinding Clock

Untap all artifacts you control during each other player's untap step.

Seat of the Synod

Orzhov Signet

Staff of Nin

At the beginning of your upkeep, draw a card.
{T}: Staff of Nin deals 1 damage to any target.

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.

Sol Ring

Aetherflux Reservoir

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.
Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

Dimir Signet

Azorius Signet

Ethersworn Adjudicator

Flying
{1}{W}{B}, {T}: Destroy target creature or enchantment.
{2}{U}: Untap Ethersworn Adjudicator.

Caltrops

Whenever a creature attacks, Caltrops deals 1 damage to it.

Foundry Inspector

Artifact spells you cast cost {1} less to cast.

Etherium Sculptor

Vault of Whispers

Solemn Simulacrum

When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
When this creature dies, you may draw a card.