Ruthless Invasion {3}{R/P}
Sorcery
({R/P} can be paid with either {R} or 2 life.)
Nonartifact creatures can't block 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.
Concussive Bolt 81%
$0.14#23995
"If you control three or more artifacts, creatures controlled by that player or by that planeswalker's controller can't block this turn."