Emergent Haunting {1}{U}
Enchantment
At the beginning of your end step, if you haven't cast a spell from your hand this turn and this enchantment isn't a creature, it becomes a 3/3 Spirit creature with flying in addition to its other types.
{2}{U}: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
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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.