Abstruse Interference {2}{U}
Instant
Devoid (This card has no color.)
Counter target spell unless its controller pays {1}. You create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add {C}." ({C} represents colorless mana.)
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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.
Frightful Delusion 95%
$0.08#25918
"Counter target spell unless its controller pays {1}. That player discards a card."
Jwari Disruption // Jwari Ruins 94%
$0.42#2704
"Counter target spell unless its controller pays {1}."
Silumgar's Scorn 94%
$0.27#12893
"Counter target spell unless its controller pays {1}. If you revealed a Dragon card or controlled a Dragon as you cast this spell, counter that spell instead."
Lofty Denial 93%
$0.26#5232
"Counter target spell unless its controller pays {1}. If you control a creature with flying, counter that spell unless its controller pays {4} instead."
Broken Ambitions 92%
$0.26#12367
"Counter target spell unless its controller pays {X}. Clash with an opponent. If you win, that spell's controller mills four cards."
Syncopate 92%
$0.28#3891
"Counter target spell unless its controller pays {X}. If that spell is countered this way, exile it instead of putting it into its owner's graveyard."
Mindswipe 92%
$0.34#14380
"Counter target spell unless its controller pays {X}. this card deals X damage to that spell's controller."
We Say Thee Nay! 92%
$0.25#17249
"Counter target spell unless its controller pays {2}. Counter that spell unless its controller pays {4} instead if this spell was cast using teamwork."
Spell Contortion 92%
$0.16#24408
"Counter target spell unless its controller pays {2}. Draw a card for each time this card was kicked."