Craft with two that share a card type (, Exile this artifact, Exile the two from among other permanents you control and/or cards from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)
This artifact enters tapped. As it enters, choose a card type shared among two exiled cards used to craft it.
: The next spell you cast this turn of the chosen type can be cast without paying its mana cost.
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.