Neko-Te 
Artifact — Equipment
$5.27 #19373 0.26 21.7 years
Whenever equipped creature deals damage to a creature, tap that creature. That creature doesn't untap during its controller's untap step for as long as this Equipment remains on the battlefield.
Whenever equipped creature deals damage to a player, that player loses 1 life.
Equip 
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Cards similar to Neko-Te 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.
Somnophore92%
$0.44↓#26208↓0.43↑28.0 years↑
"Whenever this creature deals damage to a player, tap target creature that player controls. That creature doesn't untap during its controller's untap step for as long as this creature remains on the battlefield."
Thalakos Dreamsower88%
$0.25↓#25658↓0.39↑29.0 years↑
"Whenever this creature deals damage to an opponent, tap target creature. That creature doesn't untap during its controller's untap step for as long as this creature remains tapped."
Sand Squid78%
$0.59↓#26224↓0.2727.0 years↑
"
: Tap target creature. That creature doesn't untap during its controller's untap step for as long as this creature remains tapped."
: Tap target creature. That creature doesn't untap during its controller's untap step for as long as this creature remains tapped."
Dungeon Geists78%
$0.16↓#184560.60↑14.7 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control this creature."
Deserter's Quarters76%
$0.17↓#29809↓0.3212.5 years↓
"
, : Tap target creature. It doesn't untap during its controller's untap step for as long as this artifact remains tapped."
, : Tap target creature. It doesn't untap during its controller's untap step for as long as this artifact remains tapped."
Matsu-Tribe Sniper76%
$0.12↓#181420.2521.7 years
"Whenever this creature deals damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Entrancing Lyre74%
$0.11↓#23486↓0.186.7 years↓
"
, : Tap target creature with power X or less. It doesn't untap during its controller's untap step for as long as this artifact remains tapped."
, : Tap target creature with power X or less. It doesn't untap during its controller's untap step for as long as this artifact remains tapped."
Claustrophobia74%
$0.04↓#192660.3215.1 years↓
"When this Aura enters, tap enchanted creature."
Castaway's Despair74%
$0.08↓#26418↓0.219.1 years↓
"When this Aura enters, tap enchanted creature."
Paralyze74%
$0.14↓#207020.80↑33.2 years↑
"When this Aura enters, tap enchanted creature."
Waterknot74%
$0.13↓#222110.218.8 years↓
"When this Aura enters, tap enchanted creature."
Starlight Snare74%
$0.13↓#205330.93↑1.9 years↓
"When this Aura enters, tap enchanted creature."
Ty Lee, Chi Blocker72%
$0.31↓#6659↑0.38↑0.9 years↓
"When this card enters, tap up to one target creature. It doesn't untap during its controller's untap step for as long as you control this card."
Visions of Brutality70%
$0.24↓#13259↑0.06↓10.7 years↓
"Whenever enchanted creature deals damage, its controller loses that much life."
Cement Shoes70%
$0.18↓#220790.11↓4.5 years↓
"Equipped creature doesn't untap during its controller's untap step."
+1 more matching line