Guilds of Ravnica

Boros Locket | Artifact | | {T}: Add {R} or {W}. {R/W}{R/W}{R/W}{R/W}, {T}, Sacrifice Boros Locket: Draw two cards. | Aaron Miller

Chamber Sentry | Artifact Creature | Construct | Chamber Sentry enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it. {X}, {T}, Remove X +1/+1 counters from Chamber Sentry: It deals X damage to any target. {W}{U}{B}{R}{G}: Return Chamber Sentry from your graveyard to your hand. | Adam Paquette

Chromatic Lantern | Artifact | | Lands you control have "{T}: Add one mana of any color." {T}: Add one mana of any color. | Jung Park

Dimir Locket | Artifact | | {T}: Add {U} or {B}. {U/B}{U/B}{U/B}{U/B}, {T}, Sacrifice Dimir Locket: Draw two cards. | Zezhou Chen

Gatekeeper Gargoyle | Artifact Creature | Gargoyle | Flying Gatekeeper Gargoyle enters the battlefield with a +1/+1 counter on it for each Gate you control. | Adam Paquette

Glaive of the Guildpact | Artifact | Equipment | Equipped creature gets +1/+0 for each Gate you control and has vigilance and menace. (A creature with menace can't be blocked except by two or more creatures.) Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.) | Volkan Baǵa

Golgari Locket | Artifact | | {T}: Add {B} or {G}. {B/G}{B/G}{B/G}{B/G}, {T}, Sacrifice Golgari Locket: Draw two cards. | Milivoj Ćeran

Izzet Locket | Artifact | | {T}: Add {U} or {R}. {U/R}{U/R}{U/R}{U/R}, {T}, Sacrifice Izzet Locket: Draw two cards. | Dmitry Burmak

Rampaging Monument | Artifact Creature | Cleric | Trample Rampaging Monument enters the battlefield with three +1/+1 counters on it. Whenever you cast a multicolored spell, put a +1/+1 counter on Rampaging Monument. | Tyler Walpole

Selesnya Locket | Artifact | | {T}: Add {G} or {W}. {G/W}{G/W}{G/W}{G/W}, {T}, Sacrifice Selesnya Locket: Draw two cards. | Winona Nelson

Silent Dart | Artifact | | {4}, {T}, Sacrifice Silent Dart: It deals 3 damage to target creature. | Yeong-Hao Han

Wand of Vertebrae | Artifact | | {T}: Mill a card. {2}, {T}, Exile Wand of Vertebrae: Shuffle up to five target cards from your graveyard into your library. | Volkan Baǵa