Confounding Conundrum 

Enchantment
$0.33 #8065 0.29 5.9 years
When this enchantment enters, draw a card.
Whenever a land an opponent controls enters, if that player had another land enter the battlefield under their control this turn, they return a land they control to its owner's hand.
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Cards similar to Confounding Conundrum 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.
Tunnel Ignus84%
$0.55↑#18263↓0.40↑15.9 years↑
"Whenever a land enters under an opponent's control, if that player had another land enter the battlefield under their control this turn, this creature deals 3 damage to that player."
Ankh of Mishra81%
$8.84↑#4895↑1.04↑33.1 years↑
"Whenever a land enters, this artifact deals 2 damage to that land's controller."
Zo-Zu the Punisher78%
$4.00↑#4047↑0.78↑21.9 years↑
"Whenever a land enters, Zo-Zu deals 2 damage to that land's controller."