Topplegeist 
Creature — Spirit
$0.22 #9751 0.14 10.6 years
Flying
When this creature enters, tap target creature an opponent controls.
Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, tap target creature that player controls.
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Cards similar to Topplegeist 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.
Niblis of the Mist88%
$0.15↓#28699↓0.0614.7 years↑
"When this creature enters, you may tap target creature."
Heavy Infantry87%
$0.01↓#30549↓0.0611.3 years
"When this creature enters, tap target creature an opponent controls."
Chrome Prowler87%
$0.17↓#20054↓0.053.7 years↓
"When this creature enters, tap target creature an opponent controls."
Leonin Snarecaster86%
$0.04↓#24777↓0.0713.1 years↑
"When this creature enters, you may tap target creature."
Somnomancer86%
$0.13↓#30880↓0.25↑18.5 years↑
"When this creature enters, you may tap target creature."
Glaring Aegis86%
$0.07↓#18047↓0.0611.6 years
"When this Aura enters, tap target creature an opponent controls."
Tempest Caller85%
$0.24↑#97080.38↑9.1 years↓
"When this creature enters, tap all creatures target opponent controls."
Harrier Griffin85%
$0.13↓#25786↓0.1820.7 years↑
"At the beginning of your upkeep, tap target creature."
Subjugator Angel84%
$0.31↑#94390.33↑10.2 years
"When this creature enters, tap all creatures your opponents control."
Obsessive Skinner84%
$0.22#14612↓0.1210.5 years
"At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, put a +1/+1 counter on target creature."
+1 more matching line
Tooth Collector82%
$0.05↓#25910↓0.1810.6 years
"At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, target creature that player controls gets -1/-1 until end of turn."
Sentinel of the Eternal Watch82%
$0.11↓#17372↓0.44↑11.3 years
"At the beginning of combat on each opponent's turn, tap target creature that player controls."
Intrusive Packbeast81%
$0.04↓#30067↓0.098.0 years↓
"When this creature enters, tap up to two target creatures your opponents control."
Squall Drifter80%
$0.20↓#16218↓0.1220.2 years↑
", 
: Tap target creature."
, : Tap target creature."
Thundermare80%
$0.91↑#19050↓0.33↑29.5 years↑
"When this creature enters, tap all other creatures."
Shrieking Mogg80%
$0.54↑#25468↓0.37↑26.7 years↑
"When this creature enters, tap all other creatures."
Manic Scribe80%
$0.30↑#103590.40↑10.5 years
"At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, that player mills three cards."
Chillbringer80%
$0.06↓#26268↓0.067.7 years↓
"When this creature enters, tap target creature an opponent controls. It doesn't untap during its controller's next untap step."
Frost Trickster80%
$0.10↓#17862↓0.25↑5.5 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Spire Patrol80%
$0.05↓#28618↓0.04↓9.7 years
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."