Pearl Lake Ancient {5}{U}{U}
Creature — Leviathan
Flash
This spell can't be countered.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Return three lands you control to their owner's hand: Return this creature to its owner's hand.
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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.
Icebreaker Kraken 84%
$0.39#7423
"Return three snow lands you control to their owner's hand: Return this creature to its owner's hand."