Ruthless Invasion 
Sorcery
$0.20 #20996 0.21 15.3 years
( can be paid with either 
or 2 life.)
can be paid with either or 2 life.)Nonartifact creatures can't block this turn.
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Cards similar to Ruthless Invasion 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.
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