Down // Dirty 
// 

Sorcery // Sorcery
Target player discards two cards.
Fuse (You may cast one or both halves of this card from your hand.)
Return target card from your graveyard to your hand.
Fuse (You may cast one or both halves of this card from your hand.)
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Cards that do something similar 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.
Chain of Smog 97%
$10.31#3157
"Target player discards two cards. That player may copy this spell and may choose a new target for that copy."
Kaito's Pursuit 97%
$0.29#15089
"Target player discards two cards. Ninjas and Rogues you control gain menace until end of turn."
Bog Down 96%
$0.11#29130
"Target player discards two cards. If this spell was kicked, that player discards three cards instead."
Haunting Hymn 96%
$0.04#27667
"Target player discards two cards. If you cast this spell during your main phase, that player discards four cards instead."
Aggressive Sabotage 95%
$0.09#24450
"Target player discards two cards. If this spell was kicked, it deals 3 damage to that player."
Mind Roots 94%
$0.18#21519
"Target player discards two cards. Put up to one land card discarded this way onto the battlefield tapped under your control."
Wrench Mind 86%
$0.25#21356
"Target player discards two cards unless they discard an artifact card."
Gerrard's Verdict 85%
$0.17#25183
"Target player discards two cards. You gain 3 life for each land card discarded this way."