Breaching Leviathan 
Creature — Leviathan
€4.24 #10424 0.72 12.0 years
When this creature enters, if you cast it from your hand, tap all nonblue creatures. Those creatures don't untap during their controllers' next untap steps.
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Cards similar to Breaching Leviathan 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.
Chillbringer84%
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"When this creature enters, tap target creature an opponent controls. It doesn't untap during its controller's next untap step."
Kor Hookmaster84%
€0.04↓#26033↓0.06↓17.1 years↑
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Frost Lynx84%
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"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Watertrap Weaver84%
€0.09↓#22555↓0.39↓9.1 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Stitched Mangler84%
€0.04↓#21395↓0.31↓10.6 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Spire Patrol84%
€0.04↓#28927↓0.04↓9.8 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Frost Trickster84%
€0.07↓#18004↓0.25↓5.6 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
T'Pol, Vulcan Representative84%
#32224↓0.00↓0.0 years↓
"When this card enters, tap target creature an opponent controls and put two stun counters on it."
Shipwreck Patrol84%
€0.06↓#29873↓0.16↓0.4 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Rowdy Snowballers84%
€0.09↓#13787↓0.17↓1.0 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Alchemax Slayer-Bots84%
€0.12↓#17970↓0.43↓1.1 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Fractal Mascot84%
€0.02↓#22113↓0.09↓0.6 years↓
"When this creature enters, tap target creature an opponent controls. Put a stun counter on it."
Referee Squad83%
€0.14↓#19395↓0.12↓3.6 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Utrom Scientists82%
€0.02↓#21760↓0.31↓0.7 years↓
"When this creature enters, tap up to one target creature and put a stun counter on it."
Fear of Immobility82%
€0.09↓#17931↓0.25↓2.1 years↓
"When this creature enters, tap up to one target creature. If an opponent controls that creature, put a stun counter on it."
Type-2 Phaser82%
€0.04↓#30017↓0.0 years↓
"When this Equipment enters, tap target creature an opponent controls and put a stun counter on it."
Donatello, Rad Scientist81%
€0.64↓#18577↓0.45↓0.7 years↓
"When this card enters, tap up to three target creatures your opponents control. Put a stun counter on each of them."
Gilded Scuttler80%
€0.14↓#13452↓0.06↓2.0 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Collector's Case80%
€0.11↓#25617↓0.30↓0.4 years↓
"When this artifact enters, tap up to one target creature and put two stun counters on it."
Take into Custody80%
€0.10↓#24001↓0.06↓9.8 years↓
"Tap target creature. It doesn't untap during its controller's next untap step."