Tiller Engine 
Artifact Creature — Construct
$18.37 #3315 0.50 4.1 years
Whenever a land you control enters tapped, choose one —
• Untap that land.
• Tap target nonland permanent an opponent controls.
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Cards similar to Tiller Engine 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.
Giant-Sized Flying Ant86%
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"• Tap target nonland permanent."
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"Whenever a land you control enters, choose one —"
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$0.40↓#10220↓0.16↓21.0 years↑
"
: Untap target land."
+1 more matching line
Retreat to Coralhelm73%
$0.41↓#1755↑0.36↓11.0 years↑
"Whenever a land you control enters, choose one —"
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Kiora Bests the Sea God72%
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"Whenever a land you control enters, choose one —"
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Gadwick, the Wizened72%
$0.35↓#6651↓0.76↑7.0 years↑
"Whenever you cast a blue spell, tap target nonland permanent an opponent controls."
Felidar Retreat70%
$1.26↓#521↑0.406.1 years↑
"Whenever a land you control enters, choose one —"
+1 more matching line
Tamiyo, Field Researcher70%
$0.82↓#28100.4710.2 years↑
"−2: Tap up to two target nonland permanents. They don't untap during their controller's next untap step."