Jace's Defeat 
Instant
$0.10 #23705 0.05 9.3 years
Counter target blue spell. If it was a Jace planeswalker spell, scry 2.
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Cards similar to Jace's Defeat 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.
Gainsay78%
$0.07↓#242430.0725.7 years↑
"Counter target blue spell."
Memory Drain76%
$0.13↑#16889↑0.066.7 years↓
"Counter target spell. Scry 2."
Dissolve71%
$0.24↑#6135↑0.0013.1 years↑
"Counter target spell. Scry 1."