River Song's Diary 
Artifact — Book
$0.51 #6073 0.20 2.9 years
Imprint — Whenever a player casts an instant or sorcery spell from their hand, exile it instead of putting it into a graveyard as it resolves.
At the beginning of your upkeep, if there are four or more cards exiled with this artifact, choose one of them at random. You may cast it without paying its mana cost.
Click a line or tag to filter
Cards similar to River Song's Diary expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Rod of Absorption96%
$0.51#11964↓0.195.1 years↑
"Whenever a player casts an instant or sorcery spell, exile it instead of putting it into a graveyard as it resolves."
+1 more matching line
Arcane Heist80%
$2.94↑#50970.36↑2.4 years
"You may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost. If that spell would be put into their graveyard, exile it instead."
Quistis Trepe80%
$0.23↓#9075↓0.241.2 years↓
"When this card enters, you may cast target instant or sorcery card from a graveyard, and mana of any type can be spent to cast that spell. If that spell would be put into a graveyard, exile it instead."
Shell of the Last Kappa78%
$0.68↑#22109↓0.53↑21.9 years↑
", 
: Exile target instant or sorcery spell that targets you."
, : Exile target instant or sorcery spell that targets you."+1 more matching line
Wrexial, the Risen Deep77%
$1.50↑#53080.47↑16.6 years↑
"Whenever this card deals combat damage to a player, you may cast target instant or sorcery card from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead."
Summon: Esper Valigarmanda76%
$0.24↓#53160.271.2 years↓
"Exile an instant or sorcery card from each graveyard."
Diluvian Primordial76%
$0.26↓#3658↑0.49↑13.6 years↑
"When this creature enters, for each opponent, you may cast up to one target instant or sorcery card from that player's graveyard without paying its mana cost. If a spell cast this way would be put into a graveyard, exile it instead."
Talent of the Telepath76%
$0.65↑#10314↓0.65↑11.1 years↑
"If there are two or more instant and/or sorcery cards in your graveyard, you may cast up to two instant and/or sorcery spells from among the revealed cards instead of one."
Panoptic Mirror76%
$25.49↑#10190↓1.16↑22.6 years↑
"At the beginning of your upkeep, you may copy a card exiled with this artifact. If you do, you may cast the copy without paying its mana cost."
+1 more matching line
Deluxe Dragster76%
$2.35↑#70200.52↑3.4 years
"Whenever this Vehicle deals combat damage to a player, you may cast target instant or sorcery card from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead."
Dryad Militant74%
$0.11↓#18869↓0.00↓13.9 years↑
"If an instant or sorcery card would be put into a graveyard from anywhere, exile it instead."
Dire Fleet Daredevil74%
$0.22↓#3237↑0.248.6 years↑
"When this creature enters, exile target instant or sorcery card from an opponent's graveyard. You may cast it this turn, and mana of any type can be spent to cast that spell. If that spell would be put into a graveyard, exile it instead."
Goliath Daydreamer73%
$0.28↓#9800↓0.00↓0.6 years↓
"Whenever you cast an instant or sorcery spell from your hand, exile that card with a dream counter on it instead of putting it into your graveyard as it resolves."
+1 more matching line
Spectral Arcanist72%
$0.29↓#12591↓0.42↑4.8 years↑
"When this creature enters, you may cast an instant or sorcery spell with mana value less than or equal to the number of Spirits you control from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead."
Sorcerous Squall72%
$0.80↑#8452↓0.202.8 years
"Target opponent mills nine cards, then you may cast an instant or sorcery spell from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead."
Elite Arcanist72%
$0.28↓#17315↓0.2413.1 years↑
"
, : Copy the exiled card. You may cast the copy without paying its mana cost. X is the mana value of the exiled card."
, : Copy the exiled card. You may cast the copy without paying its mana cost. X is the mana value of the exiled card."+1 more matching line
Memory Plunder72%
$1.39↑#4684↑0.38↑18.3 years↑
"You may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost."
Ore-Rich Stalactite // Cosmium Catalyst71%
$0.33↓#13808↓0.00↓2.8 years
"
, : Choose an exiled card used to craft this artifact at random. You may cast that card without paying its mana cost."
, : Choose an exiled card used to craft this artifact at random. You may cast that card without paying its mana cost."
Living Lore71%
$0.11↓#23533↓0.00↓11.4 years↑
"As this creature enters, exile an instant or sorcery card from your graveyard."
+1 more matching line
Spelltwine70%
$0.30↓#7742↓0.2014.1 years↑
"Exile target instant or sorcery card from your graveyard and target instant or sorcery card from an opponent's graveyard. Copy those cards. Cast the copies if able without paying their mana costs. Exile this card."