Neko-Te 
Artifact — Equipment
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 {2}
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Cards that do something similar 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.
Kusari-Gama 90%
$6.11#10639
"Whenever equipped creature deals damage to a blocking creature, this Equipment deals that much damage to each other creature defending player controls."
+1 more matching line
Enormous Energy Blade 89%
$0.16#23067
"Whenever this Equipment becomes attached to a creature, tap that creature."
+1 more matching line
Mercurial Kite 85%
$0.12#30460
"Whenever this creature deals combat damage to a creature, tap that creature. That creature doesn't untap during its controller's next untap step."
Queen of Ice // Rage of Winter 85%
$0.08#12986
"Whenever this creature deals combat damage to a creature, tap that creature. It doesn't untap during its controller's next untap step."
Nafs Asp 84%
$0.09#28687
"Whenever this creature deals damage to a player, that player loses 1 life at the beginning of their next draw step unless they pay {1} before that draw step."
Glass Asp 81%
$0.17#27109
"Whenever this creature deals combat damage to a player, that player loses 2 life at the beginning of their next draw step unless they pay {2} before that step."
Matsu-Tribe Sniper 80%
$0.13#17494
"Whenever this creature deals damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."