
Azorius Keyrune | Artifact | | {T}: Add {W} or {U}.
{W}{U}: Azorius Keyrune becomes a 2/2 white and blue Bird artifact creature with flying until end of turn. | Daniel Ljunggren

Civic Saber | Artifact | Equipment | Equipped creature gets +1/+0 for each of its colors.
Equip {1} | Jung Park

Codex Shredder | Artifact | | {T}: Target player mills a card. (They put the top card of their library into their graveyard.)
{5}, {T}, Sacrifice Codex Shredder: Return target card from your graveyard to your hand. | Jason Felix

Golgari Keyrune | Artifact | | {T}: Add {B} or {G}.
{B}{G}: Golgari Keyrune becomes a 2/2 black and green Insect artifact creature with deathtouch until end of turn. | Daniel Ljunggren

Izzet Keyrune | Artifact | | {T}: Add {U} or {R}.
{U}{R}: Until end of turn, Izzet Keyrune becomes a 2/1 blue and red Elemental artifact creature.
Whenever Izzet Keyrune deals combat damage to a player, you may draw a card. If you do, discard a card. | Daniel Ljunggren

Rakdos Keyrune | Artifact | | {T}: Add {B} or {R}.
{B}{R}: Rakdos Keyrune becomes a 3/1 black and red Devil artifact creature with first strike until end of turn. | Daniel Ljunggren

Selesnya Keyrune | Artifact | | {T}: Add {G} or {W}.
{G}{W}: Selesnya Keyrune becomes a 3/3 green and white Wolf artifact creature until end of turn. | Daniel Ljunggren

Street Sweeper | Artifact Creature | Construct | Whenever Street Sweeper attacks, destroy all Auras attached to target land. | Izzy

Tablet of the Guilds | Artifact | | As Tablet of the Guilds enters the battlefield, choose two colors.
Whenever you cast a spell, if it's at least one of the chosen colors, you gain 1 life for each of the chosen colors it is. | Nic Klein