Horn of Greed 
Artifact
Whenever a player plays a land, that player draws a card.
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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.
Jolrael, Voice of Zhalfir 83%
$0.30#10300
"Whenever a land creature you control deals combat damage to a player, draw a card."