Frilled Sea Serpent {4}{U}{U}
Creature — Serpent
{5}{U}{U}: This creature can't be blocked this turn.
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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.
Dreadlight Monstrosity 98%
$0.18#18139
"{3}{U}{U}: This creature can't be blocked this turn. Activate only if you own a card in exile."