: Target opponent whose turn it is may cast a spell from their hand without paying its mana cost. If they do, you copy that spell. You may choose new targets for the copy. If they don't, you draw a card.
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.
"At the beginning of your end step, target opponent may draw four cards. If they do, look at that player's hand and you may cast a spell from their hand without paying its mana cost. If they don't, put two +1/+1 counters on this card."