Acidic Soil 

Sorcery
Acidic Soil deals damage to each player equal to the number of lands they control.
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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.
Price of Progress 86%
$8.03#2774
"this card deals damage to each player equal to twice the number of nonbasic lands that player controls."