Mindwhisker 
Creature — Rat Wizard
$0.16 #8652 0.11 2.1 years
At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Threshold — As long as there are seven or more cards in your graveyard, creatures your opponents control get -1/-0.
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Cards similar to Mindwhisker 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.
Mind Drill Assailant91%
$0.13↓#15171↓0.35↑2.1 years
"
: Surveil 1."
: Surveil 1."+1 more matching line
Cephalid Inkmage90%
$0.14↓#15710↓0.28↑1.8 years
"When this creature enters, surveil 3."
Whisper Agent86%
$0.07↓#23860↓0.43↑7.9 years↑
"When this creature enters, surveil 1."
Sanitation Automaton86%
$0.08↓#22325↓0.182.6 years
"When this creature enters, surveil 1."
Shore Lurker86%
$0.09↓#24720↓0.00↓0.6 years↓
"When this creature enters, surveil 1."
Sinister Starfish86%
$0.18↑#93670.00↓5.2 years↑
"
: Surveil 1."
: Surveil 1."
Dimir Informant86%
$0.15↓#24240↓0.00↓7.9 years↑
"When this creature enters, surveil 2."
Imperious Inkmage86%
$0.05↓#25419↓0.00↓0.4 years↓
"When this creature enters, surveil 2."
A.I.M. Synthoids86%
$0.11↓#20319↓0.00↓0.2 years↓
"When this creature enters, surveil 2."
Sterling Hound86%
$0.17↑#17278↓0.072.4 years
"When this creature enters, surveil 2."
Wretched Doll85%
$0.15↓#21195↓0.181.6 years
"
, : Surveil 1."
, : Surveil 1."
Watcher in the Mist84%
$0.05↓#28012↓0.00↓7.9 years↑
"When this creature enters, surveil 2."
Wreckage Wickerfolk84%
$0.21↑#14160↓0.151.6 years
"When this creature enters, surveil 2."
Haunter of Nightveil84%
$0.07↓#29028↓0.47↑13.3 years↑
"Creatures your opponents control get -1/-0."
Dampening Pulse84%
$0.07↓#26912↓0.53↑10.9 years↑
"Creatures your opponents control get -1/-0."
Cumber Stone84%
$0.16#26099↓0.0617.6 years↑
"Creatures your opponents control get -1/-0."
Barrier of Bones84%
$0.08↓#15150↓0.00↓7.9 years↑
"When this creature enters, surveil 1."
Azorius Skyguard84%
$0.17↑#23704↓0.077.6 years↑
"Creatures your opponents control get -1/-0."
Dazzling Lights84%
$0.03↓#22909↓0.00↓7.9 years↑
"Surveil 2."
Hysterical Blindness83%
$0.06↓#28290↓0.29↑14.9 years↑
"Creatures your opponents control get -4/-0 until end of turn."