Nightveil Sprite 
Creature — Faerie Rogue
$0.11 #7481 0.05 7.9 years
Flying
Whenever this creature attacks, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
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Cards similar to Nightveil Sprite 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.
Il Mheg Pixie100%
$0.17↑#13085↓0.101.2 years↓
"Whenever this creature attacks, surveil 1."
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$0.17↑#13695↓0.111.9 years↓
"Whenever this creature attacks, surveil 1."
Fear of Surveillance100%
$0.22↑#13559↓0.091.9 years↓
"Whenever this creature attacks, surveil 1."
Boulderborn Dragon97%
$0.16↑#12849↓0.051.4 years↓
"Whenever this creature attacks, surveil 1."
Shore Lurker90%
$0.09↓#24720↓0.000.6 years↓
"When this creature enters, surveil 1."
Sanitation Automaton89%
$0.08↓#22325↓0.18↑2.6 years↓
"When this creature enters, surveil 1."
Whisper Agent89%
$0.07↓#23860↓0.43↑7.9 years
"When this creature enters, surveil 1."
Sinister Starfish89%
$0.18↑#9367↓0.005.2 years↓
"
: Surveil 1."
: Surveil 1."
Wreckage Wickerfolk89%
$0.21↑#14160↓0.151.6 years↓
"When this creature enters, surveil 2."
Watcher in the Mist89%
$0.05↓#28012↓0.007.9 years
"When this creature enters, surveil 2."
Imperious Inkmage88%
$0.05↓#25419↓0.000.4 years↓
"When this creature enters, surveil 2."
Dimir Informant88%
$0.15↑#24240↓0.007.9 years
"When this creature enters, surveil 2."
A.I.M. Synthoids88%
$0.11#20319↓0.000.2 years↓
"When this creature enters, surveil 2."
Sterling Hound88%
$0.17↑#17278↓0.072.4 years↓
"When this creature enters, surveil 2."
Wretched Doll88%
$0.15↑#21195↓0.18↑1.6 years↓
"
, : Surveil 1."
, : Surveil 1."
Ultimecia, Time Sorceress // Ultimecia, Omnipotent88%
$0.24↑#11111↓0.30↑1.2 years↓
"Whenever this card enters or attacks, surveil 2."
Barrier of Bones88%
$0.08↓#15150↓0.007.9 years
"When this creature enters, surveil 1."
Underwater Tunnel // Slimy Aquarium88%
$0.18↑#11106↓0.17↑1.9 years↓
"When you unlock this door, surveil 2."
Rune-Sealed Wall88%
$0.21↑#10811↓0.061.8 years↓
": Surveil 1."
: Surveil 1."
Consider87%
$0.29↑#379↑0.114.9 years↓
"Surveil 1."