You may play lands and cast spells from among cards in your graveyard you've surveilled this turn. If you cast a spell this way, you pay life equal to its mana value rather than 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.
"You may cast artifact spells from your graveyard by paying 3 life in addition to paying their other costs. If you cast a spell this way, that artifact enters with a finality counter on it."