Mercurial Kite 
Creature — Bird
$0.09 #31021 0.33 23.4 years
Flying
Whenever this creature deals combat damage to a creature, tap that creature. That creature doesn't untap during its controller's next untap step.
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Cards similar to Mercurial Kite 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.
Orochi Ranger100%
$0.08↓#266800.12↓22.1 years↓
"Whenever this creature deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Kashi-Tribe Warriors100%
$0.17↑#287520.3222.1 years↓
"Whenever this creature deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Kashi-Tribe Reaver98%
$0.17↑#256500.00↓22.1 years↓
"Whenever this creature deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Queen of Ice // Rage of Winter98%
$0.13↑#13599↑0.14↓7.0 years↓
"Whenever this creature deals combat damage to a creature, tap that creature. It doesn't untap during its controller's next untap step."
Matsu-Tribe Decoy96%
$0.13↑#267840.13↓22.1 years↓
"Whenever this creature deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Matsu-Tribe Birdstalker96%
$0.10↑#274080.07↓21.4 years↓
"Whenever this creature deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Matsu-Tribe Sniper94%
$0.12↑#18142↑0.2521.7 years↓
"Whenever this creature deals damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Frostwalk Bastion93%
$0.14↑#10547↑0.07↓7.4 years↓
"Whenever this land deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Kashi-Tribe Elite90%
$0.33↑#19142↑0.18↓21.4 years↓
"Whenever this creature deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Chillbringer84%
$0.06↓#262680.06↓7.7 years↓
"When this creature enters, tap target creature an opponent controls. It doesn't untap during its controller's next untap step."
Frost Trickster84%
$0.10↑#17862↑0.255.5 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Spire Patrol84%
$0.05↓#286180.04↓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."
Frost Lynx84%
$0.04↓#20063↑0.2712.3 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%
$0.13↑#21336↑0.3110.5 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Watertrap Weaver84%
$0.08↓#22463↑0.399.1 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Kor Hookmaster84%
$0.05↓#258850.06↓17.0 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Rowdy Snowballers81%
$0.10↑#13824↑0.17↓0.9 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Alchemax Slayer-Bots81%
$0.19↑#18034↑0.431.1 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Shipwreck Patrol81%
$0.21↑#296660.16↓0.3 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Fractal Mascot81%
$0.09#22254↑0.09↓0.5 years↓
"When this creature enters, tap target creature an opponent controls. Put a stun counter on it."