Confidence:StrongSolidPlausibleTentativeSpeculative

• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes River Song's Diary's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Echoes of Eternity

  3CCC

  Kindred Enchantment — EldraziC

  Echoes of Eternity makes River Song's Diary's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Song of Creation

  1GUR

  EnchantmentGRU

  River Song's Diary lets you cast/play from exile, enabling Song of Creation's exile-recursion loop.
• Baron Helmut Zemo

  BBB

  Legendary Creature — Human Noble VillainB

  River Song's Diary lets you cast/play from exile, enabling Baron Helmut Zemo's exile-recursion loop.
• Hydro-Man, Fluid Felon

  UU

  Legendary Creature — Elemental VillainU

  River Song's Diary lets you cast/play from exile, enabling Hydro-Man, Fluid Felon's exile-recursion loop.
• Temporal Extortion

  BBBB

  SorceryB

  River Song's Diary lets you cast/play from exile, enabling Temporal Extortion's exile-recursion loop.
• Shanid, Sleepers' Scourge

  1RWB

  Legendary Creature — Human KnightBRW

  River Song's Diary lets you cast/play from exile, enabling Shanid, Sleepers' Scourge's exile-recursion loop.
• Quintorius Kand

  3RW

  Legendary Planeswalker — QuintoriusRW

  River Song's Diary lets you cast/play from exile, enabling Quintorius Kand's exile-recursion loop.
• The Circle of Loyalty

  4WW

  Legendary ArtifactW

  River Song's Diary lets you cast/play from exile, enabling The Circle of Loyalty's exile-recursion loop.
• Jodah, the Unifier

  WUBRG

  Legendary Creature — Human WizardBGRUW

  River Song's Diary lets you cast/play from exile, enabling Jodah, the Unifier's exile-recursion loop.
• Kasla, the Broken Halo

  3URW

  Legendary Creature — Angel AllyRUW

  River Song's Diary lets you cast/play from exile, enabling Kasla, the Broken Halo's exile-recursion loop.
• Lavinia, Foil to Conspiracy

  1W/UW/U

  Legendary Creature — Human DetectiveUW

  River Song's Diary lets you cast/play from exile, enabling Lavinia, Foil to Conspiracy's exile-recursion loop.
• Runaway Steam-Kin

  1R

  Creature — ElementalR

  River Song's Diary lets you cast/play from exile, enabling Runaway Steam-Kin's exile-recursion loop.
• Dash Hopes

  BB

  InstantB

  River Song's Diary lets you cast/play from exile, enabling Dash Hopes's exile-recursion loop.
• Fire Lord Zuko

  RWB

  Legendary Creature — Human Noble AllyBRW

  River Song's Diary lets you cast/play from exile, enabling Fire Lord Zuko's exile-recursion loop.
• Malcolm, the Eyes

  UR

  Legendary Creature — Siren PirateRU

  River Song's Diary lets you cast/play from exile, enabling Malcolm, the Eyes's exile-recursion loop.
• Malicious Affliction

  BB

  InstantB

  River Song's Diary lets you cast/play from exile, enabling Malicious Affliction's exile-recursion loop.
• Deathbringer Liege

  2W/BW/BW/B

  Creature — HorrorBW

  River Song's Diary lets you cast/play from exile, enabling Deathbringer Liege's exile-recursion loop.
• Neerdiv, Devious Diver

  2U

  Legendary Creature — Merfolk RogueU

  River Song's Diary lets you cast/play from exile, enabling Neerdiv, Devious Diver's exile-recursion loop.
• Questing Druid // Seek the Beast

  1G1R

  Creature — Human Druid // Instant — AdventureGR

  River Song's Diary lets you cast/play from exile, enabling Questing Druid's exile-recursion loop.
• Reki, the History of Kamigawa

  2G

  Legendary Creature — Human ShamanG

  River Song's Diary lets you cast/play from exile, enabling Reki, the History of Kamigawa's exile-recursion loop.
• Moderation

  1WU

  EnchantmentUW

  River Song's Diary lets you cast/play from exile, enabling Moderation's exile-recursion loop.
• Ramos, Dragon Engine

  6

  Legendary Artifact Creature — DragonBGRUW

  River Song's Diary lets you cast/play from exile, enabling Ramos, Dragon Engine's exile-recursion loop.
• Norin the Wary

  R

  Legendary Creature — Human WarriorR

  River Song's Diary lets you cast/play from exile, enabling Norin the Wary's exile-recursion loop.
• Chandra, Torch of Defiance

  2RR

  Legendary Planeswalker — ChandraR

  River Song's Diary lets you cast/play from exile, enabling Chandra, Torch of Defiance's exile-recursion loop.